Book - Deep work by Cal Newport

Definition

Deep Work:

Professional activities performed in a state of distraction-free concentration that push your cognitive capabilities to their limit. These efforts create new value, improve your skill, and are hard to replicate.

The ability to focus without distraction on a cognitively demanding task. The benefit is that it allows you to quickly master complicated information and produce better results in less time.

(Basically, just doing difficult tasks without being distracted. That, and not just any difficult tasks. Working on tasks that are actually going to make a significant impact and actually get you closer towards your goals.)

Introduction

Deep work is necessary to wring every last drop of value out of your current intellectual capacity. We now know from decades of research in both psychology and neuroscience that the state of mental strain that accompanies deep work is also necessary to improve your abilities.

Indeed, if you study the lives of other influential figures from both distant and recent history, you’ll find that a commitment to deep work is a common theme.

Here’s how Neal Stephenson once explained why he is bad with electronic communication :

“If I organize my life in such a way that I get lots of long, consecutive, uninterrupted time-chunks, I can write novels. [If I instead get interrupted a lot] what replaces it? Instead of a novel that will be around for a long time… there is a bunch of e-mail messages that I have sent out to individual persons.”

The ubiquity of deep work among influential individuals is important to emphasize because it stands in sharp contrast to the behavior of most modern knowledge workers - a group that’s rapidly forgetting the value of going deep.

The reason knowledge workers are losing their familiarity with deep work is well established: network tools. A 2012 McKinsey study found that the average knowledge worker now spends more than 60 percent of the workweek engaged in electronic communication and Internet searching, with close to 30 percent of a worker’s time dedicated to reading and answering e-mail alone.

This state of fragmented attention cannot accommodate deep work, which requires long periods of uninterrupted thinking.

Shallow Work: Noncognitively demanding, logistical-style tasks, often performed while distracted. These efforts tend to not create much new value in the world and are easy to replicate.

What the Internet seems to be doing is chipping away my capacity for concentration and contemplation, admitted journalist Nicholas Carr, in an oft-cited 2008 Atlantic article. [And] I’m not the only one. Carr expanded this argument into a book, The Shallows, which became a finalist for the Pulitzer Prize. To write The Shallows, appropriately enough, Carr had to move to a cabin and forcibly disconnect.

Deep work is not some nostalgic affectation of writers and early-twentieth-century philosophers. It’s instead a skill that has great value today.

Deep work is not, an old-fashioned skill falling into irrelevance. It’s instead a crucial ability for anyone looking to move ahead in a globally competitive information economy that tends to chew up and spit out those who aren’t earning their keep. The real rewards are reserved not for those who are comfortable using Facebook, but instead for those who are comfortable building the innovative distributed systems that run the service (a decidedly deep task, hard to replicate). Deep work is so important that we might consider it, to use the phrasing of business writer Eric Barker, “the superpower of the 21st century.”

The Deep Work Hypothesis: The ability to perform deep work is becoming increasingly rare at exactly the same time it is becoming increasingly valuable in our economy. As a consequence, the few who cultivate this skill, and then make it the core of their working life, will thrive.

Three to four hours a day, five days a week, of uninterrupted and carefully directed concentration, it turns out, can produce a lot of valuable output.

I’m comfortable being bored, and this can be a surprisingly rewarding skill.

PART 1 The Idea

Chapter One - Deep Work Is Valuable

The High-Skilled Workers

In other words, those with the oracular (being an oracle) ability to work with and tease valuable results out of increasingly complex machines will thrive.

The Superstars

Once the talent market is made universally accessible, those at the peak of the market thrive while the rest suffer.

“Hearing a succession of mediocre singers does not add up to a single outstanding performance.” In other words, talent is not a commodity you can buy in bulk and combine to reach the needed levels: There’s a premium to being the best. Therefore, if you’re in a marketplace where the consumer has access to all performers, and everyone’s q value is clear, the consumer will choose the very best. Even if the talent advantage of the best is small compared to the next rung down on the skill ladder, the superstars still win the bulk of the market.

The Owners

First recall that bargaining theory, a key component in standard economic thinking, argues that when money is made through the combination of capital investment and labor, the rewards are returned, roughly speaking, proportional to the input. As digital technology reduces the need for labor in many industries, the proportion of the rewards returned to those who own the intelligent machines is growing.

Current economic thinking, argues that the unprecedented growth and impact of technology are creating a massive restructuring of our economy. In this new economy, three groups will have a particular advantage: those who can work well and creatively with intelligent machines, those who are the best at what they do, and those with access to capital.

Two Core Abilities for Thriving in the New Economy

1. The ability to quickly master hard things.

2. The ability to produce at an elite level, in terms of both quality and speed.

We must remember that we’ve been spoiled by the intuitive and drop-dead-simple user experience of many consumer-facing technologies, like Twitter and the iPhone. These examples, however, are consumer products, not serious tools: Most of the intelligent machines driving the Great Restructuring are significantly more complex to understand and master.

To join the group of those who can work well with these machines, requires that you hone your ability to master hard things. And because these technologies change rapidly, this process of mastering hard things never ends: You must be able to do it quickly, again and again.

This ability to learn hard things quickly, of course, isn’t just necessary for working well with intelligent machines; it also plays a key role in the attempt to become a superstar in just about any field - even those that have little to do with technology. If you can’t learn, you can’t thrive.

Producing at an elite level: If you want to become a superstar, mastering the relevant skills is necessary, but not sufficient. You must then transform that latent potential into tangible results that people value.

If you don’t produce, you won’t thrive - no matter how skilled or talented you are.

It’s here that we arrive at a central thesis of this book: The two core abilities just described depend on your ability to perform deep work. If you haven’t mastered this foundational skill, you’ll struggle to learn hard things or produce at an elite level.

The dependence of these abilities on deep work isn’t immediately obvious; it requires a closer look at the science of learning, concentration, and productivity.

Deep Work Helps You Quickly Learn Hard Things

“Let your mind become a lens, thanks to the converging rays of attention; let your soul be all intent on whatever it is that is established in your mind as a dominant, wholly absorbing idea.”

In other words, To learn requires intense concentration.

In the early 1990s, K. Anders Ericsson, a professor at Florida State University, pulled together these strands into a single coherent answer, consistent with the growing research literature, that he gave a punchy name: deliberate practice. Ericsson opens his seminal paper on the topic with a powerful claim: “We deny that these differences [between expert performers and normal adults] are immutable… Instead, we argue that the differences between expert performers and normal adults reflect a life-long period of deliberate effort to improve performance in a specific domain.”

To master a cognitively demanding task requires this specific form of practice - there are few exceptions made for natural talent. Men of genius themselves were great only by bringing all their power to bear on the point on which they had decided to show their full measure.

This brings us to the question of what deliberate practice actually requires. Its core components are usually identified as follows: (1) your attention is focused tightly on a specific skill you’re trying to improve or an idea you’re trying to master; (2) you receive feedback so you can correct your approach to keep your attention exactly where it’s most productive.

Deliberate practice cannot exist alongside distraction, and it instead requires uninterrupted concentration. As Ericsson emphasizes, “Diffused attention is almost antithetical to the focused attention required by deliberate practice”.

As psychologists, Ericsson and the other researchers in his field are not interested in why deliberate practice works; they’re just identifying it as an effective behavior. In the intervening decades since Ericsson’s first major papers on the topic, however, neuroscientists have been exploring the physical mechanisms that drive people’s improvements on hard tasks. As the journalist Daniel Coyle surveys in his 2009 book, The Talent Code, these scientists increasingly believe the answer includes myelin - a layer of fatty tissue that grows around neurons, acting like an insulator that allows the cells to fire faster and cleaner. To understand the role of myelin in improvement, keep in mind that skills, be they intellectual or physical, eventually reduce down to brain circuits. This new science of performance argues that you get better at a skill as you develop more myelin around the relevant neurons, allowing the corresponding circuit to fire more effortlessly and effectively. To be great at something is to be well myelinated.

This understanding is important because it provides a neurological foundation for why deliberate practice works. By focusing intensely on a specific skill, you’re forcing the specific relevant circuit to fire, again and again, in isolation. This repetitive use of a specific circuit triggers cells called oligodendrocytes to begin wrapping layers of myelin around the neurons in the circuits - effectively cementing the skill. The reason, therefore, why it’s important to focus intensely on the task at hand while avoiding distraction is because this is the only way to isolate the relevant neural circuit enough to trigger useful myelination.

In the century that has passed since Antonin-Dalmace Sertillanges first wrote about using the mind like a lens to focus rays of attention, we have advanced from this elevated metaphor to a decidedly less poetic explanation expressed in terms of oligodendrocyte cells. But this sequence of thinking about thinking points to an inescapable conclusion: To learn hard things quickly, you must focus intensely without distraction. To learn, in other words, is an act of deep work. If you’re comfortable going deep, you’ll be comfortable mastering the increasingly complex systems and skills needed to thrive in our economy. If you instead remain one of the many for whom depth is uncomfortable and distraction ubiquitous, you shouldn’t expect these systems and skills to come easily to you.

Deep Work Helps You Produce at an Elite Level

Think a lot about the mechanics of producing at an elite level. See productivity as a scientific problem to systematically solve.

A law of productivity: High-Quality Work Produced = (Time Spent) x (Intensity of Focus)

In a 2009 paper, titled, intriguingly, “Why Is It So Hard to Do My Work?,” Sophie Leroy, a business professor at the University of Minnesota, introduced an effect she called attention residue.

When you switch from some Task A to another Task B, your attention doesn’t immediately follow - a residue of your attention remains stuck thinking about the original task. This residue gets especially thick if your work on Task A was unbounded and of low intensity before you switched, but even if you finish Task A before moving on, your attention remains divided for a while.

“People experiencing attention residue after switching tasks are likely to demonstrate poor performance on that next task,” and the more intense the residue, the worse the performance.

The concept of attention residue helps explain why the intensity formula is true.

Even if you’re unable to fully replicate extreme isolation, the attention residue concept is still telling because it implies that the common habit of working in a state of semi-distraction is potentially devastating to your performance. It might seem harmless to take a quick glance at your inbox every ten minutes or so. That quick check introduces a new target for your attention. Even worse, by seeing messages that you cannot deal with at the moment (which is almost always the case), you’ll be forced to turn back to the primary task with a secondary task left unfinished. The attention residue left by such unresolved switches dampens your performance.

When we step back from these individual observations, we see a clear argument form: To produce at your peak level you need to work for extended periods with full concentration on a single task free from distraction. Put another way, the type of work that optimizes your performance is deep work. If you’re not comfortable going deep for extended periods of time, it’ll be difficult to get your performance to the peak levels of quality and quantity increasingly necessary to thrive professionally. Unless your talent and skills absolutely dwarf those of your competition, the deep workers among them will outproduce you.

What about Jack Dorsey?

The necessity of distraction in the executives’ work lives is highly specific to their particular jobs. A good chief executive is essentially a hard-to-automate decision engine, not unlike IBM’s Jeopardy!-playing Watson system. They have built up a hard-won repository of experience and have honed and proved an instinct for their market. They’re then presented inputs throughout the day - in the form of e-mails, meetings, site visits, and the like - that they must process and act on. To ask a CEO to spend four hours thinking deeply about a single problem is a waste of what makes him or her valuable. It’s better to hire three smart subordinates to think deeply about the problem and then bring their solutions to the executive for a final decision.

The fact that Dorsey encourages interruption or Kerry Trainor checks his e-mail constantly doesn’t mean that you’ll share their success if you follow suit: Their behaviors are characteristic of their specific roles as corporate officers.

There are certain corners of our economy where depth is not valued. In addition to executives, we can also include, for example, certain types of salesmen and lobbyists, for whom constant connection is their most valued currency.

Put another way: Deep work is not the only skill valuable in our economy, and it’s possible to do well without fostering this ability, but the niches where this is advisable are increasingly rare. Unless you have strong evidence that distraction is important for your specific profession, you’re best served by giving serious consideration to depth.

Chapter Two - Deep Work Is Rare

Open offices, might create more opportunities for collaboration,* but they do so at the cost of “massive distraction”. “If you are just getting into some work and a phone goes off in the background, it ruins what you are concentrating on”. “Even though you are not aware at the time, the brain responds to distractions.”

An interruption, even if short, delays the total time required to complete a task by a significant fraction. This was reported by subjects as being very detrimental.

The Unwinding by George Packer

Big trends in business today actively decrease people’s ability to perform deep work, even though the benefits promised by these trends (e.g., increased serendipity, faster responses to requests, and more exposure) are arguably dwarfed by the benefits that flow from a commitment to deep work (e.g., the ability to learn hard things fast and produce at an elite level).

The rareness of deep work is not due to some fundamental weakness of the habit. When we look closer at why we embrace distraction in the workplace we’ll find the reasons are more arbitrary than we might expect - based on flawed thinking combined with the ambiguity and confusion that often define knowledge work. Although our current embrace of distraction is a real phenomenon, it’s built on an unstable foundation and can be easily dismissed once you decide to cultivate a deep work ethic.

The Metric Black Hole

Even though we abstractly accept that distraction has costs and depth has value, these impacts, are difficult to measure. This isn’t a trait unique to habits related to distraction and depth: Generally speaking, as knowledge work makes more complex demands of the labor force, it becomes harder to measure the value of an individual’s efforts.

We should not, therefore, expect the bottom-line impact of depth-destroying behaviors to be easily detected. Such metrics fall into an opaque region resistant to easy measurement - a region I call the metric black hole. Of course, just because it’s hard to measure metrics related to deep work doesn’t automatically lead to the conclusion that businesses will dismiss it. We have many examples of behaviors for which it’s hard to measure their bottom-line impact but that nevertheless flourish in our business culture; But without clear metrics to support it, any business behavior is vulnerable to unstable whim and shifting forces, and in this volatile scrum deep work has fared particularly poorly.

The Principle of Least Resistance

The Principle of Least Resistance: In a business setting, without clear feedback on the impact of various behaviors to the bottom line (in the absence of metrics), we will tend toward behaviors that are easiest in the moment.

Busyness as a Proxy for Productivity

Here, is the late Nobel Prize–winning physicist Richard Feynman explaining in an interview one of his less orthodox productivity strategies:

To do real good physics work, you do need absolute solid lengths of time… it needs a lot of concentration… if you have a job administrating anything, you don’t have the time. So I have invented another myth for myself: that I’m irresponsible. I’m actively irresponsible. I tell everyone I don’t do anything. If anyone asks me to be on a committee for admissions, “no,” I tell them: I’m irresponsible.

Feynman was adamant in avoiding administrative duties because he knew they would only decrease his ability to do the one thing that mattered most in his professional life: “to do real good physics work.” Feynman, we can assume, was probably bad at responding to e-mails and would likely switch universities if you had tried to move him into an open office or demand that he tweet. Clarity about what matters provides clarity about what does not.

Many seem to be turning back to the last time when productivity was more universally observable: the industrial age.

Recall that with the rise of assembly lines came the rise of the Efficiency Movement. It seems that in today’s business landscape, many knowledge workers, bereft of other ideas, are turning toward this old definition of productivity in trying to solidify their value in the otherwise bewildering landscape of their professional lives. Knowledge workers, are tending toward increasingly visible busyness because they lack a better way to demonstrate their value.

Busyness as Proxy for Productivity: In the absence of clear indicators of what it means to be productive and valuable in their jobs, many knowledge workers turn back toward an industrial indicator of productivity: doing lots of stuff in a visible manner.

This mind-set provides another explanation for the popularity of many depth-destroying behaviors. If you send and answer e-mails at all hours, if you schedule and attend meetings constantly, if you weigh in on instant message systems like Hall within seconds when someone poses a new question, or if you roam your open office bouncing ideas off all whom you encounter - all of these behaviors make you seem busy in a public manner. If you’re using busyness as a proxy for productivity, then these behaviors can seem crucial for convincing yourself and others that you’re doing your job well.

Even those who have a clear understanding of what it means to succeed in their knowledge work job can still be lured away from depth. All it takes is an ideology seductive enough to convince you to discard common sense.

The Cult of the Internet

Why has deep work become so paradoxically rare?

A foundation for our answer can be found in a warning provided by the late communication theorist and New York University professor Neil Postman. Writing in the early 1990s, as the personal computer revolution first accelerated, Postman argued that our society was sliding into a troubling relationship with technology. We were, he noted, no longer discussing the trade-offs surrounding new technologies, balancing the new efficiencies against the new problems introduced. If it’s high-tech, we began to instead assume, then it’s good. Case closed.

He called such a culture a technopoly, and he didn’t mince words in warning against it. “Technopoly eliminates alternatives to itself in precisely the way Aldous Huxley outlined in Brave New World,” he argued in his 1993 book on the topic. “It does not make them illegal. It does not make them immoral. It does not even make them unpopular. It makes them invisible and therefore irrelevant.”

To not embrace all things Internet, is, “invisible and therefore irrelevant.”

Deep work is at a severe disadvantage in a technopoly because it builds on values like quality, craftsmanship, and mastery that are decidedly old-fashioned and nontechnological. Even worse, to support deep work often requires the rejection of much of what is new and high-tech. Deep work is exiled in favor of more distracting high-tech behaviors, like the professional use of social media, not because the former is empirically inferior to the latter. Indeed, if we had hard metrics relating the impact of these behaviors on the bottom line, our current technopoly would likely crumble. But the metric black hole prevents such clarity and allows us instead to elevate all things Internet into Morozov’s feared “uber-ideology.” In such a culture, we should not be surprised that deep work struggles to compete against the shiny thrum of tweets, likes, tagged photos, walls, posts, and all the other behaviors that we’re now taught are necessary for no other reason than that they exist.

Bad for Business. Good for You.

If you believe in the value of depth, the reality spells bad news for businesses in general, as it’s leading them to miss out on potentially massive increases in their value production. But for you, as an individual, good news lurks. The myopia of your peers and employers uncovers a great personal advantage.

Chapter Three - Deep Work Is Meaningful

The connection between deep work and a good life is familiar and widely accepted when considering the world of craftsmen. “The satisfactions of manifesting oneself concretely in the world through manual competence have been known to make a man quiet and easy,” explains Matthew Crawford.

Regardless of the angle from which you attack the issue of depth and knowledge work, it’s clear that by embracing depth over shallowness you can tap the same veins of meaning that drive craftsmen. A deep life is not just economically lucrative, but also a life well lived.

A Neurological Argument for Depth

Like fingers pointing to the moon, other diverse disciplines from anthropology to education, behavioral economics to family counseling, similarly suggest that the skillful management of attention is the sine qua non of the good life and the key to improving virtually every aspect of your experience.

Who you are, what you think, feel, and do, what you love - is the sum of what you focus on.

Skillful use of emotional “leverage points” can generate a significantly more positive outcome after negative events.

Gallagher’s grand theory tells us that your world is the outcome of what you pay attention to. There’s a gravity and sense of importance inherent in deep work. Gallagher’s theory predicts that if you spend enough time in this state, your mind will understand your world as rich in meaning and importance.

Such rapt attention and concentration hijacks your attention apparatus, preventing you from noticing the many smaller and less pleasant things that unavoidably and persistently populate our lives. (concentration so intense that there is no attention left over to think about anything irrelevant, or to worry about problems.) This danger is especially pronounced in knowledge work, which due to its dependence on ubiquitous connectivity generates a devastatingly appealing buffet of distraction - most of which will, if given enough attention, leach meaning and importance from the world constructed by your mind.

The world represented by your inbox, in other words, isn’t a pleasant world to inhabit.

In work, to increase the time you spend in a state of depth is to leverage the complex machinery of the human brain in a way that for several different neurological reasons maximizes the meaning and satisfaction you’ll associate with your working life.

A Psychological Argument for Depth

“The best moments usually occur when a person’s body or mind is stretched to its limits in a voluntary effort to accomplish something difficult and worthwhile.” - Csikszentmihalyi.

Ironically, jobs are actually easier to enjoy than free time, because like flow activities they have built-in goals, feedback rules, and challenges, all of which encourage one to become involved in one’s work, to concentrate and lose oneself in it. Free time, on the other hand, is unstructured, and requires much greater effort to be shaped into something that can be enjoyed.

When measured empirically, people were happier at work and less happy relaxing than they suspected. The more such flow experiences that occur in a given week, the higher the subject’s life satisfaction. Human beings are at their best when immersed deeply in something challenging.

The connection between deep work and flow should be clear: Deep work is an activity well suited to generate a flow state (the phrases used by Csikszentmihalyi to describe what generates flow include notions of stretching your mind to its limits, concentrating, and losing yourself in an activity - all of which also describe deep work). And as we just learned, flow generates happiness. Combining these two ideas we get a powerful argument from psychology in favor of depth. The act of going deep orders the consciousness in a way that makes life worthwhile. To build your working life around the experience of flow produced by deep work is a proven path to deep satisfaction.

A Philosophical Argument for Depth

In 2011, Dreyfus and Kelly published a book, All Things Shining, which explores how notions of sacredness and meaning have evolved throughout the history of human culture. The Enlightenment’s metaphysical embrace of the autonomous individual leads not just to a boring life, it leads almost inevitably to a nearly unlivable one."

Craftsmanship, Dreyfus and Kelly argue in their book’s conclusion, provides a key to reopening a sense of sacredness in a responsible manner.

As Dreyfus and Kelly explain, such sacredness is common to craftsmanship. The task of a craftsman, they conclude, “is not to generate meaning, but rather to cultivate in himself the skill of discerning the meanings that are already there.” This frees the craftsman of the nihilism of autonomous individualism, providing an ordered world of meaning. At the same time, this meaning seems safer than the sources cited in previous eras. The wheelwright cannot easily use the inherent quality of a piece of pine to justify a despotic monarchy.

Any pursuit - be it physical or cognitive - that supports high levels of skill can also generate a sense of sacredness.

Beautiful code is short and concise, so if you were to give that code to another programmer they would say, “oh, that’s well written code.” It’s much like as if you were writing a poem.

The Pragmatic Programmer, makes this connection between code and old-style craftsmanship more directly by quoting the medieval quarry worker’s creed in its preface: “We who cut mere stones must always be envisioning cathedrals.” The book then elaborates that computer programmers must see their work in the same way:

Within the overall structure of a project there is always room for individuality and craftsmanship… One hundred years from now, our engineering may seem as archaic as the techniques used by medieval cathedral builders seem to today’s civil engineers, while our craftsmanship will still be honored.

The second key observation about this line of argument is that cultivating craftsmanship is necessarily a deep task and therefore requires a commitment to deep work. Deep work is key to extracting meaning from your profession in the manner described by Dreyfus and Kelly. It follows that to embrace deep work in your own career, and to direct it toward cultivating your skill, is an effort that can transform a knowledge work job from a distracted, draining obligation into something satisfying - a portal to a world full of shining, wondrous things.

I earlier quoted Winifred Gallagher, the converted disciple of depth, saying, “I’ll live the focused life, because it’s the best kind there is.” This is perhaps the best way to sum up the argument of this chapter and of Part 1 more broadly: A deep life is a good life, any way you look at it.

PART 2

The Rules

Rule #1 - Work Deeply

David Dewane brought up the Eudaimonia Machine. Dewane is an architecture professor, and therefore likes to explore the intersection between the conceptual and the concrete. The Eudaimonia Machine is a good example of this intersection. The machine, which takes its name from the ancient Greek concept of eudaimonia (a state in which you’re achieving your full human potential), turns out to be a building. “The goal of the machine,” David explained, “is to create a setting where the users can get into a state of deep human flourishing - creating work that’s at the absolute extent of their personal abilities.” It is, in other words, a space designed for the sole purpose of enabling the deepest possible deep work.

As Dewane explained the machine to me, he grabbed a pen to sketch its proposed layout. The structure is a one-story narrow rectangle made up of five rooms, placed in a line, one after another. There’s no shared hallway: you have to pass through one room to get to the next. As Dewane explains, “[The lack of circulation] is critical because it doesn’t allow you to bypass any of the spaces as you get deeper into the machine.”

The first room you enter when coming off the street is called the gallery. In Dewane’s plan, this room would contain examples of deep work produced in the building. It’s meant to inspire users of the machine, creating a “culture of healthy stress and peer pressure.”

As you leave the gallery, you next enter the salon. In here, Dewane imagines access to high-quality coffee and perhaps even a full bar. There are also couches and Wi-Fi. The salon is designed to create a mood that “hovers between intense curiosity and argumentation.” This is a place to debate, “brood,” and in general work through the ideas that you’ll develop deeper in the machine.

Beyond the salon you enter the library. This room stores a permanent record of all work produced in the machine, as well as the books and other resources used in this previous work. There will be copiers and scanners for gathering and collecting the information you need for your project. Dewane describes the library as “the hard drive of the machine.”

The next room is the office space. It contains a standard conference room with a whiteboard and some cubicles with desks. “The office,” Dewane explains, “is for low-intensity activity.” To use our terminology, this is the space to complete the shallow efforts required by your project. Dewane imagines an administrator with a desk in the office who could help its users improve their work habits to optimize their efficiency.

This brings us to the final room of the machine, a collection of what Dewane calls “deep work chambers” (he adopted the term “deep work” from my articles on the topic). Each chamber is conceived to be six by ten feet and protected by thick soundproof walls (Dewane’s plans call for eighteen inches of insulation). “The purpose of the deep work chamber is to allow for total focus and uninterrupted work flow,” Dewane explains. He imagines a process in which you spend ninety minutes inside, take a ninety-minute break, and repeat two or three times - at which point your brain will have achieved its limit of concentration for the day.

For now, the Eudaimonia Machine exists only as a collection of architectural drawings, but even as a plan, its potential to support impactful work excites Dewane. “[This design] remains, in my mind, the most interesting piece of architecture I’ve ever produced,” he told me.

In an ideal world - one in which the true value of deep work is accepted and celebrated - we’d all have access to something like the Eudaimonia Machine; a work environment (and culture) designed to help us extract as much value as possible from our brains. We instead find ourselves in distracting open offices where inboxes cannot be neglected and meetings are incessant - a setting where colleagues would rather you respond quickly to their latest e-mail than produce the best possible results. But you’re a disciple of depth in a shallow world.

This rule (#1) is designed to reduce this conflict. You might not have access to your own Eudaimonia Machine, but the strategies that follow will help you simulate its effects in your otherwise distracted professional life. They’ll show you how to transform deep work from an aspiration into a regular and significant part of your daily schedule. (Rules #2 through #4 will then help you get the most out of this deep work habit by presenting strategies for training your concentration ability and fighting back encroaching distractions.)

Why do we need such involved interventions? Once you accept that deep work is valuable, isn’t it enough to just start doing more of it? Do we really need something as complicated as the Eudaimonia Machine (or its equivalent) for something as simple as remembering to concentrate more often?

Unfortunately, when it comes to replacing distraction with focus, matters are not so simple. Most people recognize that the urge to turn your attention toward something more superficial can complicate efforts to concentrate on hard things, but most underestimate its regularity and strength.

You have a finite amount of willpower that becomes depleted as you use it.

Your will is not a manifestation of your character that you can deploy without limit; it’s instead like a muscle that tires. This is why the subjects in the Hofmann and Baumeister study had such a hard time fighting desires - over time these distractions drained their finite pool of willpower until they could no longer resist. The same will happen to you, regardless of your intentions - unless, that is, you’re smart about your habits.

This brings me to the motivating idea behind the strategies that follow: The key to developing a deep work habit is to move beyond good intentions and add routines and rituals to your working life designed to minimize the amount of your limited willpower necessary to transition into and maintain a state of unbroken concentration. For example, in the middle of a distracted afternoon spent Web browsing, if you suddenly decide to switch your attention to a cognitively demanding task, you’ll draw heavily from your finite willpower to wrest your attention away from the online shininess. Therefore such attempts will frequently fail. On the other hand, if you deployed smart routines and rituals - perhaps a set time and quiet location used for your deep tasks each afternoon - you’d require much less willpower to start and keep going. In the long run, you’d therefore succeed with these deep efforts far more often.

With this in mind, the six strategies that follow can be understood as an arsenal of routines and rituals designed with the science of limited willpower in mind to maximize the amount of deep work you consistently accomplish in your schedule. Among other things, they’ll ask you to commit to a particular pattern for scheduling this work and develop rituals to sharpen your concentration before starting each session. Some of these strategies will deploy simple heuristics to hijack your brain’s motivation center while others are designed to recharge your willpower reserves at the fastest possible rate.

You could just try to make deep work a priority. But supporting this decision with the strategies that follow - or strategies of your own devising that are motivated by the same principles - will significantly increase the probability that you succeed in making deep work a crucial part of your professional life.

Decide on Your Depth Philosophy

The famed computer scientist Donald Knuth cares about deep work. As he explains on his website: “What I do takes long hours of studying and uninterruptible concentration.” A doctoral candidate named Brian Chappell, who is a father with a full-time job, also values deep work, as it’s the only way he can make progress on his dissertation given his limited time. Chappell told me that his first encounter with the idea of deep work was “an emotional moment.”

I mention these examples because although Knuth and Chappell agree on the importance of depth, they disagree on their philosophies for integrating this depth into their work lives. As I’ll detail in the next section, Knuth deploys a form of monasticism that prioritizes deep work by trying to eliminate or minimize all other types of work. Chappell, by contrast, deploys a rhythmic strategy in which he works for the same hours (five to seven thirty a.m.) every weekday morning, without exception, before beginning a workday punctuated by standard distractions. Both approaches work, but not universally. Knuth’s approach might make sense for someone whose primary professional obligation is to think big thoughts, but if Chappell adopted a similar rejection of all things shallow, he’d likely lose his job.

You need your own philosophy for integrating deep work into your professional life. (As argued in this rule’s introduction, attempting to schedule deep work in an ad hoc fashion is not an effective way to manage your limited willpower.) But this example highlights a general warning about this selection: You must be careful to choose a philosophy that fits your specific circumstances, as a mismatch here can derail your deep work habit before it has a chance to solidify. This strategy will help you avoid this fate by presenting four different depth philosophies that I’ve seen work exceptionally well in practice. The goal is to convince you that there are many different ways to integrate deep work into your schedule, and it’s therefore worth taking the time to find an approach that makes sense for you.

The Monastic Philosophy of Deep Work Scheduling

Let’s return to Donald Knuth. He’s famous for many innovations in computer science, including, notably, the development of a rigorous approach to analyzing algorithm performance. Among his peers, however, Knuth also maintains an aura of infamy for his approach to electronic communication. If you visit Knuth’s website at Stanford with the intention of finding his e-mail address, you’ll instead discover the following note:

I have been a happy man ever since January 1, 1990, when I no longer had an email address. I’d used email since about 1975, and it seems to me that 15 years of email is plenty for one lifetime. Email is a wonderful thing for people whose role in life is to be on top of things. But not for me; my role is to be on the bottom of things. What I do takes long hours of studying and uninterruptible concentration.

Knuth goes on to acknowledge that he doesn’t intend to cut himself off completely from the world. He notes that writing his books requires communication with thousands of people and that he wants to be responsive to questions and comments. His solution? He provides an address - a postal mailing address. He says that his administrative assistant will sort through any letters arriving at that address and put aside those that she thinks are relevant. Anything that’s truly urgent she’ll bring to Knuth promptly, and everything else he’ll handle in a big batch, once every three months or so.

Knuth deploys what I call the monastic philosophy of deep work scheduling. This philosophy attempts to maximize deep efforts by eliminating or radically minimizing shallow obligations. Practitioners of the monastic philosophy tend to have a well-defined and highly valued professional goal that they’re pursuing, and the bulk of their professional success comes from doing this one thing exceptionally well. It’s this clarity that helps them eliminate the thicket of shallow concerns that tend to trip up those whose value proposition in the working world is more varied.

Knuth, for example, explains his professional goal as follows: “I try to learn certain areas of computer science exhaustively; then I try to digest that knowledge into a form that is accessible to people who don’t have time for such study.” Trying to pitch Knuth on the intangible returns of building an audience on Twitter, or the unexpected opportunities that might come through a more liberal use of e-mail, will fail, as these behaviors don’t directly aid his goal to exhaustively understand specific corners of computer science and then write about them in an accessible manner.

Another person committed to monastic deep work is the acclaimed science fiction writer Neal Stephenson. If you visit Stephenson’s author website, you’ll notice a lack of e-mail or mailing address. We can gain insight into this omission from a pair of essays that Stephenson posted on his early website (hosted on The Well) back in the early 2000s, and which have been preserved by the Internet Archive. In one such essay, archived in 2003, Stephenson summarizes his communication policy as follows:

Persons who wish to interfere with my concentration are politely requested not to do so, and warned that I don’t answer e-mail… lest [my communication policy’s] key message get lost in the verbiage, I will put it here succinctly: All of my time and attention are spoken for - several times over. Please do not ask for them.

To further justify this policy, Stephenson wrote an essay titled “Why I Am a Bad Correspondent.” At the core of his explanation for his inaccessibility is the following decision:

The productivity equation is a non-linear one. This accounts for why I am a bad correspondent and why I very rarely accept speaking engagements. If I organize my life in such a way that I get lots of long, consecutive, uninterrupted time-chunks, I can write novels. But as those chunks get separated and fragmented, my productivity as a novelist drops spectacularly.

In my experience, the monastic philosophy makes many knowledge workers defensive. The clarity with which its adherents identify their value to the world, I suspect, touches a raw nerve for those whose contribution to the information economy is more complex. Notice, of course, that “more complex” does not mean “lesser.” A high-level manager, for example, might play a vital role in the functioning of a billion-dollar company, even if she cannot point to something discrete, like a completed novel, and say, “This is what I produced this year.” Therefore, the pool of individuals to whom the monastic philosophy applies is limited - and that’s okay. If you’re outside this pool, its radical simplicity shouldn’t evince too much envy. On the other hand, if you’re inside this pool - someone whose contribution to the world is discrete, clear, and individualized* - then you should give this philosophy serious consideration, as it might be the deciding factor between an average career and one that will be remembered.

The Bimodal Philosophy of Deep Work Scheduling

This book opened with a story about the revolutionary psychologist and thinker Carl Jung. In the 1920s, at the same time that Jung was attempting to break away from the strictures of his mentor, Sigmund Freud, he began regular retreats to a rustic stone house he built in the woods outside the small town of Bollingen. When there, Jung would lock himself every morning into a minimally appointed room to write without interruption. He would then meditate and walk in the woods to clarify his thinking in preparation for the next day’s writing. These efforts, I argued, were aimed at increasing the intensity of Jung’s deep work to a level that would allow him to succeed in intellectual combat with Freud and his many supporters.

In recalling this story I want to emphasize something important: Jung did not deploy a monastic approach to deep work. Donald Knuth and Neal Stephenson, our examples from earlier, attempted to completely eliminate distraction and shallowness from their professional lives. Jung, by contrast, sought this elimination only during the periods he spent at his retreat. The rest of Jung’s time was spent in Zurich, where his life was anything but monastic: He ran a busy clinical practice that often had him seeing patients until late at night; he was an active participant in the Zurich coffeehouse culture; and he gave and attended many lectures in the city’s respected universities. (Einstein received his doctorate from one university in Zurich and later taught at another; he also, interestingly enough, knew Jung, and the two shared several dinners to discuss the key ideas of Einstein’s special relativity.) Jung’s life in Zurich, in other words, is similar in many ways to the modern archetype of the hyperconnected digital-age knowledge worker: Replace “Zurich” with “San Francisco” and “letter” with “tweet” and we could be discussing some hotshot tech CEO.

Jung’s approach is what I call the bimodal philosophy of deep work. This philosophy asks that you divide your time, dedicating some clearly defined stretches to deep pursuits and leaving the rest open to everything else. During the deep time, the bimodal worker will act monastically - seeking intense and uninterrupted concentration. During the shallow time, such focus is not prioritized. This division of time between deep and open can happen on multiple scales. For example, on the scale of a week, you might dedicate a four-day weekend to depth and the rest to open time. Similarly, on the scale of a year, you might dedicate one season to contain most of your deep stretches (as many academics do over the summer or while on sabbatical).

The bimodal philosophy believes that deep work can produce extreme productivity, but only if the subject dedicates enough time to such endeavors to reach maximum cognitive intensity - the state in which real breakthroughs occur. This is why the minimum unit of time for deep work in this philosophy tends to be at least one full day. To put aside a few hours in the morning, for example, is too short to count as a deep work stretch for an adherent of this approach.

At the same time, the bimodal philosophy is typically deployed by people who cannot succeed in the absence of substantial commitments to non-deep pursuits. Jung, for example, needed his clinical practice to pay the bills and the Zurich coffeehouse scene to stimulate his thinking. The approach of shifting between two modes provides a way to serve both needs well.

To provide a more modern example of the bimodal philosophy in action, we can once again consider Adam Grant, the Wharton Business School professor whose thoughtfulness about work habits was first introduced in Part 1. As you might recall, Grant’s schedule during his rapid rise through the professorship ranks at Wharton provides a nice bimodality case study. On the scale of the academic year, he stacked his courses into one semester, so that he could focus the other on deep work. During these deep semesters he then applied the bimodal approach on the weekly scale. He would, perhaps once or twice a month, take a period of two to four days to become completely monastic. He would shut his door, put an out-of-office auto-responder on his e-mail, and work on his research without interruption. Outside of these deep sessions, Grant remained famously open and accessible. In some sense, he had to be: His 2013 bestseller, Give and Take, promotes the practice of giving of your time and attention, without expectation of something in return, as a key strategy in professional advancement.

Those who deploy the bimodal philosophy of deep work admire the productivity of the monastics but also respect the value they receive from the shallow behaviors in their working lives. Perhaps the biggest obstacle to implementing this philosophy is that even short periods of deep work require a flexibility that many fear they lack in their current positions. If even an hour away from your inbox makes you uncomfortable, then certainly the idea of disappearing for a day or more at a time will seem impossible. But I suspect bimodal working is compatible with more types of jobs than you might guess. Earlier, for example, I described a study by Harvard Business School professor Leslie Perlow. In this study, a group of management consultants were asked to disconnect for a full day each workweek. The consultants were afraid the client would rebel. It turned out that the client didn’t care. As Jung, Grant, and Perlow’s subjects discovered, people will usually respect your right to become inaccessible if these periods are well defined and well advertised, and outside these stretches, you’re once again easy to find.

The Rhythmic Philosophy of Deep Work Scheduling

Seinfeld began his advice with some common sense, noting “the way to be a better comic was to create better jokes,” and then explaining that the way to create better jokes was to write every day. Seinfeld continued by describing a specific technique he used to help maintain this discipline. He keeps a calendar on his wall. Every day that he writes jokes he crosses out the date on the calendar with a big red X. “After a few days you’ll have a chain,” Seinfeld said. “Just keep at it and the chain will grow longer every day. You’ll like seeing that chain, especially when you get a few weeks under your belt. Your only job next is to not break the chain.”

This chain method (as some now call it) soon became a hit among writers and fitness enthusiasts - communities that thrive on the ability to do hard things consistently. For our purposes, it provides a specific example of a general approach to integrating depth into your life: the rhythmic philosophy. This philosophy argues that the easiest way to consistently start deep work sessions is to transform them into a simple regular habit. The goal, in other words, is to generate a rhythm for this work that removes the need for you to invest energy in deciding if and when you’re going to go deep. The chain method is a good example of the rhythmic philosophy of deep work scheduling because it combines a simple scheduling heuristic (do the work every day), with an easy way to remind yourself to do the work: the big red Xs on the calendar.

Another common way to implement the rhythmic philosophy is to replace the visual aid of the chain method with a set starting time that you use every day for deep work. In much the same way that maintaining visual indicators of your work progress can reduce the barrier to entry for going deep, eliminating even the simplest scheduling decisions, such as when during the day to do the work, also reduces this barrier.

Consider the example of Brian Chappell, the busy doctoral candidate I introduced in the opening to this strategy. Chappell adopted the rhythmic philosophy of deep work scheduling out of necessity. Around the time that he was ramping up his dissertation writing he was offered a full-time job at a center on the campus where he was a student. Professionally, this was a good opportunity and Chappell was happy to accept it. But academically, a full-time job, especially when coupled with the recent arrival of Chappell’s first child, made it difficult to find the depth needed to write thesis chapters.

Chappell began by attempting a vague commitment to deep work. He made a rule that deep work needed to happen in ninety-minute chunks (recognizing correctly that it takes time to ease into a state of concentration) and he decided he would try to schedule these chunks in an ad hoc manner whenever appropriate openings in his schedule arose. Not surprisingly, this strategy didn’t yield much productivity. In a dissertation boot camp Chappell had attended the year before, he’d managed to produce a full thesis chapter in a single week of rigorous deep work. After he accepted his full-time job, he managed to produce only a single additional chapter in the entire first year he was working.

It was the glacial writing progress during this year that drove Chappell to embrace the rhythmic method. He made a rule that he would wake up and start working by five thirty every morning. He would then work until seven thirty, make breakfast, and go to work already done with his dissertation obligations for the day. Pleased by early progress, he soon pushed his wake-up time to four forty-five to squeeze out even more morning depth.

When I interviewed Chappell for this book, he described his rhythmic approach to deep work scheduling as “both astronomically productive and guilt free.” His routine was producing four to five pages of academic prose per day and was capable of generating drafts of thesis chapters at a rate of one chapter every two or three weeks: a phenomenal output for someone who also worked a nine-to-five job. “Who’s to say that I can’t be that prolific?” he concluded. “Why not me?”

The rhythmic philosophy provides an interesting contrast to the bimodal philosophy. It perhaps fails to achieve the most intense levels of deep thinking sought in the daylong concentration sessions favored by the bimodalist. The trade-off, however, is that this approach works better with the reality of human nature. By supporting deep work with rock-solid routines that make sure a little bit gets done on a regular basis, the rhythmic scheduler will often log a larger total number of deep hours per year.

The decision between rhythmic and bimodal can come down to your self-control in such scheduling matters. If you’re Carl Jung and are engaged in an intellectual dogfight with Sigmund Freud’s supporters, you’ll likely have no trouble recognizing the importance of finding time to focus on your ideas. On the other hand, if you’re writing a dissertation with no one pressuring you to get it done, the habitual nature of the rhythmic philosophy might be necessary to maintain progress.

For many, however, it’s not just self-control issues that bias them toward the rhythmic philosophy, but also the reality that some jobs don’t allow you to disappear for days at a time when the need to go deep arises. (For a lot of bosses, the standard is that you’re free to focus as hard as you want… so long as the boss’s e-mails are still answered promptly.) This is likely the biggest reason why the rhythmic philosophy is one of the most common among deep workers in standard office jobs.

The Journalistic Philosophy of Deep Work Scheduling

In the 1980s, the journalist Walter Isaacson was in his thirties and well along in his rapid ascent through the ranks of Time magazine. By this point, he was undoubtedly on the radar of the thinking class. Christopher Hitchens, for example, writing in the London Review of Books during this period, called him “one of the best magazine journalists in America.” The time was right for Isaacson to write a Big Important Book - a necessary step on the ladder of journalistic achievement. So Isaacson chose a complicated topic, an intertwined narrative biography of six figures who played an important role in early Cold War policy, and teamed up with a fellow young Time editor, Evan Thomas, to produce an appropriately weighty book: an 864-page epic titled The Wise Men: Six Friends and the World They Made.

This book, which was published in 1986, was well received by the right people. The New York Times called it “a richly textured account,” while the San Francisco Chronicle exulted that the two young writers had “fashioned a Cold War Plutarch.” Less than a decade later, Isaacson reached the apex of his journalism career when he was appointed editor of Time (which he then followed with a second act as the CEO of a think tank and an incredibly popular biographer of figures including Benjamin Franklin, Albert Einstein, and Steve Jobs).

What interests me about Isaacson, however, is not what he accomplished with his first book but how he wrote it. In uncovering this story, I must draw from a fortunate personal connection. As it turns out, in the years leading up to the publication of The Wise Men, my uncle John Paul Newport, who was also a journalist in New York at the time, shared a summer beach rental with Isaacson. To this day, my uncle remembers Isaacson’s impressive work habits:

It was always amazing… he could retreat up to the bedroom for a while, when the rest of us were chilling on the patio or whatever, to work on his book… he’d go up for twenty minutes or an hour, we’d hear the typewriter pounding, then he’d come down as relaxed as the rest of us… the work never seemed to faze him, he just happily went up to work when he had the spare time.

Isaacson was methodic: Any time he could find some free time, he would switch into a deep work mode and hammer away at his book. This is how, it turns out, one can write a nine-hundred-page book on the side while spending the bulk of one’s day becoming one of the country’s best magazine writers.

I call this approach, in which you fit deep work wherever you can into your schedule, the journalist philosophy. This name is a nod to the fact that journalists, like Walter Isaacson, are trained to shift into a writing mode on a moment’s notice, as is required by the deadline-driven nature of their profession.

This approach is not for the deep work novice. As I established in the opening to this rule, the ability to rapidly switch your mind from shallow to deep mode doesn’t come naturally. Without practice, such switches can seriously deplete your finite willpower reserves. This habit also requires a sense of confidence in your abilities - a conviction that what you’re doing is important and will succeed. This type of conviction is typically built on a foundation of existing professional accomplishment. Isaacson, for example, likely had an easier time switching to writing mode than, say, a first-time novelist, because Isaacson had worked himself up to become a respected writer by this point. He knew he had the capacity to write an epic biography and understood it to be a key task in his professional advancement. This confidence goes a long way in motivating hard efforts.

I’m partial to the journalistic philosophy of deep work because it’s my main approach to integrating these efforts into my schedule. In other words, I’m not monastic in my deep work (though I do find myself occasionally jealous of my fellow computer scientist Donald Knuth’s unapologetic disconnection), I don’t deploy multiday depth binges like the bimodalists, and though I am intrigued by the rhythmic philosophy, my schedule has a way of thwarting attempts to enforce a daily habit. Instead, in an ode to Isaacson, I face each week as it arrives and do my best to squeeze out as much depth as possible. To write this book, for example, I had to take advantage of free stretches of time wherever they popped up. If my kids were taking a good nap, I’d grab my laptop and lock myself in the home office. If my wife wanted to visit her parents in nearby Annapolis on a weekend day, I’d take advantage of the extra child care to disappear to a quiet corner of their house to write. If a meeting at work was canceled, or an afternoon left open, I might retreat to one of my favorite libraries on campus to squeeze out a few hundred more words. And so on.

I should admit that I’m not pure in my application of the journalist philosophy. I don’t, for example, make all my deep work decisions on a moment-to-moment basis. I instead tend to map out when I’ll work deeply during each week at the beginning of the week, and then refine these decisions, as needed, at the beginning of each day (see Rule #4 for more details on my scheduling routines). By reducing the need to make decisions about deep work moment by moment, I can preserve more mental energy for the deep thinking itself.

In the final accounting, the journalistic philosophy of deep work scheduling remains difficult to pull off. But if you’re confident in the value of what you’re trying to produce, and practiced in the skill of going deep (a skill we will continue to develop in the strategies that follow), it can be a surprisingly robust way to squeeze out large amounts of depth from an otherwise demanding schedule.

Ritualize

An often-overlooked observation about those who use their minds to create valuable things is that they’re rarely haphazard in their work habits. Consider the Pulitzer Prize–winning biographer Robert Caro. As revealed in a 2009 magazine profile, “every inch of [Caro’s] New York office is governed by rules.” Where he places his books, how he stacks his notebooks, what he puts on his wall, even what he wears to the office: Everything is specified by a routine that has varied little over Caro’s long career. “I trained myself to be organized,” he explained.

Charles Darwin had a similarly strict structure for his working life during the period when he was perfecting On the Origin of Species. As his son Francis later remembered, he would rise promptly at seven to take a short walk. He would then eat breakfast alone and retire to his study from eight to nine thirty. The next hour was dedicated to reading his letters from the day before, after which he would return to his study from ten thirty until noon. After this session, he would mull over challenging ideas while walking on a proscribed route that started at his greenhouse and then circled a path on his property. He would walk until satisfied with his thinking then declare his workday done.

The journalist Mason Currey, who spent half a decade cataloging the habits of famous thinkers and writers (and from whom I learned the previous two examples), summarized this tendency toward systematization as follows:

There is a popular notion that artists work from inspiration - that there is some strike or bolt or bubbling up of creative mojo from who knows where… but I hope [my work] makes clear that waiting for inspiration to strike is a terrible, terrible plan. In fact, perhaps the single best piece of advice I can offer to anyone trying to do creative work is to ignore inspiration.

In a New York Times column on the topic, David Brooks summarizes this reality more bluntly: “[Great creative minds] think like artists but work like accountants.”

This strategy suggests the following: To make the most out of your deep work sessions, build rituals of the same level of strictness and idiosyncrasy as the important thinkers mentioned previously. There’s a good reason for this mimicry. Great minds like Caro and Darwin didn’t deploy rituals to be weird; they did so because success in their work depended on their ability to go deep, again and again - there’s no way to win a Pulitzer Prize or conceive a grand theory without pushing your brain to its limit. Their rituals minimized the friction in this transition to depth, allowing them to go deep more easily and stay in the state longer. If they had instead waited for inspiration to strike before settling in to serious work, their accomplishments would likely have been greatly reduced.

There’s no one correct deep work ritual - the right fit depends on both the person and the type of project pursued. But there are some general questions that any effective ritual must address:

• Where you’ll work and for how long. Your ritual needs to specify a location for your deep work efforts. This location can be as simple as your normal office with the door shut and desk cleaned off (a colleague of mine likes to put a hotel-style “do not disturb” sign on his office door when he’s tackling something difficult). If it’s possible to identify a location used only for depth - for instance, a conference room or quiet library - the positive effect can be even greater. (If you work in an open office plan, this need to find a deep work retreat becomes particularly important.) Regardless of where you work, be sure to also give yourself a specific time frame to keep the session a discrete challenge and not an open-ended slog.

• How you’ll work once you start to work. Your ritual needs rules and processes to keep your efforts structured. For example, you might institute a ban on any Internet use, or maintain a metric such as words produced per twenty-minute interval to keep your concentration honed. Without this structure, you’ll have to mentally litigate again and again what you should and should not be doing during these sessions and keep trying to assess whether you’re working sufficiently hard. These are unnecessary drains on your willpower reserves.

• How you’ll support your work. Your ritual needs to ensure your brain gets the support it needs to keep operating at a high level of depth. For example, the ritual might specify that you start with a cup of good coffee, or make sure you have access to enough food of the right type to maintain energy, or integrate light exercise such as walking to help keep the mind clear. (As Nietzsche said: “It is only ideas gained from walking that have any worth.”) This support might also include environmental factors, such as organizing the raw materials of your work to minimize energy-dissipating friction (as we saw with Caro’s example). To maximize your success, you need to support your efforts to go deep. At the same time, this support needs to be systematized so that you don’t waste mental energy figuring out what you need in the moment.

These questions will help you get started in crafting your deep work ritual. But keep in mind that finding a ritual that sticks might require experimentation, so be willing to work at it. I assure you that the effort’s worth it: Once you’ve evolved something that feels right, the impact can be significant. To work deeply is a big deal and should not be an activity undertaken lightly. Surrounding such efforts with a complicated (and perhaps, to the outside world, quite strange) ritual accepts this reality - providing your mind with the structure and commitment it needs to slip into the state of focus where you can begin to create things that matter.

Make Grand Gestures

This is a curious but effective strategy in the world of deep work: the grand gesture. The concept is simple: By leveraging a radical change to your normal environment, coupled perhaps with a significant investment of effort or money, all dedicated toward supporting a deep work task, you increase the perceived importance of the task. This boost in importance reduces your mind’s instinct to procrastinate and delivers an injection of motivation and energy.

When you study the habits of other well-known deep workers, the grand gesture strategy comes up often. Bill Gates, for example, was famous during his time as Microsoft CEO for taking Think Weeks during which he would leave behind his normal work and family obligations to retreat to a cabin with a stack of papers and books. His goal was to think deeply, without distraction, about the big issues relevant to his company. It was during one of these weeks, for example, that he famously came to the conclusion that the Internet was going to be a major force in the industry. There was nothing physically stopping Gates from thinking deeply in his office in Microsoft’s Seattle headquarters, but the novelty of his weeklong retreat helped him achieve the desired levels of concentration.

The MIT physicist and award-winning novelist Alan Lightman also leverages grand gestures. In his case, he retreats each summer to a “tiny island” in Maine to think deeply and recharge. At least as of 2000, when he described this gesture in an interview, the island not only lacked Internet, but didn’t even have phone service. As he then justified: “It’s really about two and a half months that I’ll feel like I can recover some silence in my life… which is so hard to find.”

Not everyone has the freedom to spend two months in Maine, but many writers, including Dan Pink and Michael Pollan, simulate the experience year-round by building - often at significant expense and effort - writing cabins on their properties. These outbuildings aren’t strictly necessary for these writers, who need only a laptop and a flat surface to put it on to ply their trade. But it’s not the amenities of the cabins that generate their value; it’s instead the grand gesture represented in the design and building of the cabin for the sole purpose of enabling better writing.

Not every grand gesture need be so permanent. After the pathologically competitive Bell Labs physicist William Shockley was scooped in the invention of the transistor - as I detail in the next strategy, two members of his team made the breakthrough at a time when Shockley was away working on another project - he locked himself in a hotel room in Chicago, where he had traveled ostensibly to attend a conference. He didn’t emerge from the room until he had ironed out the details for a better design that had been rattling around in his mind. When he finally did leave the room, he airmailed his notes back to Murray Hill, New Jersey, so that a colleague could paste them into his lab notebook and sign them to timestamp the innovation. The junction form of the transistor that Shockley worked out in this burst of depth ended up earning him a share of the Nobel Prize subsequently awarded for the invention.

An even more extreme example of a onetime grand gesture yielding results is a story involving Peter Shankman, an entrepreneur and social media pioneer. As a popular speaker, Shankman spends much of his time flying. He eventually realized that thirty thousand feet was an ideal environment for him to focus. As he explained in a blog post, “Locked in a seat with nothing in front of me, nothing to distract me, nothing to set off my ‘Ooh! Shiny!’ DNA, I have nothing to do but be at one with my thoughts.” It was sometime after this realization that Shankman signed a book contract that gave him only two weeks to finish the entire manuscript. Meeting this deadline would require incredible concentration. To achieve this state, Shankman did something unconventional. He booked a round-trip business-class ticket to Tokyo. He wrote during the whole flight to Japan, drank an espresso in the business class lounge once he arrived in Japan, then turned around and flew back, once again writing the whole way - arriving back in the States only thirty hours after he first left with a completed manuscript now in hand. “The trip cost $4,000 and was worth every penny,” he explained.

In all of these examples, it’s not just the change of environment or seeking of quiet that enables more depth. The dominant force is the psychology of committing so seriously to the task at hand. To put yourself in an exotic location to focus on a writing project, or to take a week off from work just to think, or to lock yourself in a hotel room until you complete an important invention: These gestures push your deep goal to a level of mental priority that helps unlock the needed mental resources. Sometimes to go deep, you must first go big.

Don’t Work Alone

The relationship between deep work and collaboration is tricky. It’s worth taking the time to untangle because properly leveraging collaboration can increase the quality of deep work in your professional life.

This decision between promoting concentration and promoting serendipity seems to indicate that deep work (an individual endeavor) is incompatible with generating creative insights (a collaborative endeavor). This conclusion is flawed. It’s based on an incomplete understanding of the theory of serendipitous creativity. To support this claim, let’s consider the origins of this particular understanding of what spurs breakthroughs.

The theory in question has many sources, but I happen to have a personal connection to one of the more well-known. During my seven years at MIT, I worked on the site of the institute’s famed Building 20. This structure, located at the intersection of Main and Vassar Streets in East Cambridge, and eventually demolished in 1998, was thrown together as a temporary shelter during World War II, meant to house the overflow from the school’s bustling Radiation Laboratory. As noted by a 2012 New Yorker article, the building was initially seen as a failure: “Ventilation was poor and hallways were dim. The walls were thin, the roof leaked, and the building was broiling in the summer and freezing in the winter.”

When the war ended, however, the influx of scientists to Cambridge continued. MIT needed space, so instead of immediately demolishing Building 20 as they had promised local officials (in exchange for lax permitting), they continued using it as overflow space. The result was that a mismatch of different departments - from nuclear science to linguistics to electronics - shared the low-slung building alongside more esoteric tenants such as a machine shop and a piano repair facility. Because the building was cheaply constructed, these groups felt free to rearrange space as needed. Walls and floors could be shifted and equipment bolted to the beams. In recounting the story of Jerrold Zacharias’s work on the first atomic clock, the abovementioned New Yorker article points to the importance of his ability to remove two floors from his Building 20 lab so he could install the three-story cylinder needed for his experimental apparatus.

In MIT lore, it’s generally believed that this haphazard combination of different disciplines, thrown together in a large reconfigurable building, led to chance encounters and a spirit of inventiveness that generated breakthroughs at a fast pace, innovating topics as diverse as Chomsky grammars, Loran navigational radars, and video games, all within the same productive postwar decades. When the building was finally demolished to make way for the $300 million Frank Gehry–designed Stata Center (where I spent my time), its loss was mourned. In tribute to the “plywood palace” it replaced, the interior design of the Stata Center includes boards of unfinished plywood and exposed concrete with construction markings left intact.

Around the same time that Building 20 was hastily constructed, a more systematic pursuit of serendipitous creativity was under way two hundred miles to the southwest in Murray Hill, New Jersey. It was here that Bell Labs director Mervin Kelly guided the construction of a new home for the lab that would purposefully encourage interaction between its diverse mix of scientists and engineers. Kelly dismissed the standard university-style approach of housing different departments in different buildings, and instead connected the spaces into one contiguous structure joined by long hallways - some so long that when you stood at one end it would appear to converge to a vanishing point. As Bell Labs chronicler Jon Gertner notes about this design: “Traveling the hall’s length without encountering a number of acquaintances, problems, diversions and ideas was almost impossible. A physicist on his way to lunch in the cafeteria was like a magnet rolling past iron filings.”

This strategy, mixed with Kelly’s aggressive recruitment of some of the world’s best minds, yielded some of the most concentrated innovation in the history of modern civilization. In the decades following the Second World War, the lab produced, among other achievements: the first solar cell, laser, communication satellite, cellular communication system, and fiber optic networking. At the same time, their theorists formulated both information theory and coding theory, their astronomers won the Nobel Prize for empirically validating the Big Bang Theory, and perhaps most important of all, their physicists invented the transistor.

The theory of serendipitous creativity, in other words, seems well justified by the historical record. The transistor, we can argue with some confidence, probably required Bell Labs and its ability to put solid-state physicists, quantum theorists, and world-class experimentalists in one building where they could serendipitously encounter one another and learn from their varied expertise. This was an invention unlikely to come from a lone scientist thinking deeply in the academic equivalent of Carl Jung’s stone tower.

But it’s here that we must embrace more nuance in understanding what really generated innovation in sites such as Building 20 and Bell Labs. To do so, let’s return once again to my own experience at MIT. When I arrived as a new PhD student in the fall of 2004, I was a member of the first incoming class to be housed in the new Stata Center, which, as mentioned, replaced Building 20. Because the center was new, incoming students were given tours that touted its features. Frank Gehry, we learned, arranged the offices around common spaces and introduced open stairwells between adjacent floors, all in an effort to support the type of serendipitous encounters that had defined its predecessor. But what struck me at the time was a feature that hadn’t occurred to Gehry but had been recently added at the faculty’s insistence: special gaskets installed into the office doorjambs to improve soundproofing. The professors at MIT - some of the most innovative technologists in the world - wanted nothing to do with an open-office-style workspace. They instead demanded the ability to close themselves off.

This combination of soundproofed offices connected to large common areas yields a hub-and-spoke architecture of innovation in which both serendipitous encounter and isolated deep thinking are supported. It’s a setup that straddles a spectrum where on one extreme we find the solo thinker, isolated from inspiration but free from distraction, and on the other extreme, we find the fully collaborative thinker in an open office, flush with inspiration but struggling to support the deep thinking needed to build on it.*

If we turn our attention back to Building 20 and Bell Labs, we see that this is the architecture they deployed as well. Neither building offered anything resembling a modern open office plan. They were instead constructed using the standard layout of private offices connected to shared hallways. Their creative mojo had more to do with the fact that these offices shared a small number of long connecting spaces - forcing researchers to interact whenever they needed to travel from one location to another. These mega-hallways, in other words, provided highly effective hubs.

We can, therefore, still dismiss the depth-destroying open office concept without dismissing the innovation-producing theory of serendipitous creativity. The key is to maintain both in a hub-and-spoke-style arrangement: Expose yourself to ideas in hubs on a regular basis, but maintain a spoke in which to work deeply on what you encounter.

This division of efforts, however, is not the full story, as even when one returns to a spoke, solo work is still not necessarily the best strategy. Consider, for example, the previously mentioned invention of the (point-contact) transistor at Bell Labs. This breakthrough was supported by a large group of researchers, all with separate specialties, who came together to form the solid-state physics research group - a team dedicated to inventing a smaller and more reliable alternative to the vacuum tube. This group’s collaborative conversations were necessary preconditions to the transistor: a clear example of the usefulness of hub behavior.

Once the research group laid the intellectual groundwork for the component, the innovation process shifted to a spoke. What makes this particular innovation process an interesting case, however, is that even when it shifted to a spoke it remained collaborative. It was two researchers in particular - the experimentalist Walter Brattain and the quantum theorist John Bardeen - who over a period of one month in 1947 made the series of breakthroughs that led to the first working solid-state transistor.

Brattain and Bardeen worked together during this period in a small lab, often side by side, pushing each other toward better and more effective designs. These efforts consisted primarily of deep work - but a type of deep work we haven’t yet encountered. Brattain would concentrate intensely to engineer an experimental design that could exploit Bardeen’s latest theoretical insight; then Bardeen would concentrate intensely to make sense of what Brattain’s latest experiments revealed, trying to expand his theoretical framework to match the observations. This back-and-forth represents a collaborative form of deep work (common in academic circles) that leverages what I call the whiteboard effect. For some types of problems, working with someone else at the proverbial shared whiteboard can push you deeper than if you were working alone. The presence of the other party waiting for your next insight - be it someone physically in the same room or collaborating with you virtually - can short-circuit the natural instinct to avoid depth.

We can now step back and draw some practical conclusions about the role of collaboration in deep work. The success of Building 20 and Bell Labs indicates that isolation is not required for productive deep work. Indeed, their example indicates that for many types of work - especially when pursuing innovation - collaborative deep work can yield better results. This strategy, therefore, asks that you consider this option in contemplating how best to integrate depth into your professional life. In doing so, however, keep the following two guidelines in mind.

First, distraction remains a destroyer of depth. Therefore, the hub-and-spoke model provides a crucial template. Separate your pursuit of serendipitous encounters from your efforts to think deeply and build on these inspirations. You should try to optimize each effort separately, as opposed to mixing them together into a sludge that impedes both goals.

Second, even when you retreat to a spoke to think deeply, when it’s reasonable to leverage the whiteboard effect, do so. By working side by side with someone on a problem, you can push each other toward deeper levels of depth, and therefore toward the generation of more and more valuable output as compared to working alone.

When it comes to deep work, in other words, consider the use of collaboration when appropriate, as it can push your results to a new level. At the same time, don’t lionize this quest for interaction and positive randomness to the point where it crowds out the unbroken concentration ultimately required to wring something useful out of the swirl of ideas all around us.

Execute Like a Business

The story has become lore in the world of business consulting. In the mid-1990s, Harvard Business School professor Clayton Christensen received a call from Andy Grove, the CEO and chairman of Intel. Grove had encountered Christensen’s research on disruptive innovation and asked him to fly out to California to discuss the theory’s implications for Intel. On arrival, Christensen walked through the basics of disruption: entrenched companies are often unexpectedly dethroned by start-ups that begin with cheap offerings at the low end of the market, but then, over time, improve their cheap products just enough to begin to steal high-end market share. Grove recognized that Intel faced this threat from low-end processors produced by upstart companies like AMD and Cyrix. Fueled by his newfound understanding of disruption, Grove devised the strategy that led to the Celeron family of processors - a lower-performance offering that helped Intel successfully fight off the challenges from below.

There is, however, a lesser-known piece to this story. As Christensen recalls, Grove asked him during a break in this meeting, “How do I do this?” Christensen responded with a discussion of business strategy, explaining how Grove could set up a new business unit and so on. Grove cut him off with a gruff reply: “You are such a naïve academic. I asked you how to do it, and you told me what I should do. I know what I need to do. I just don’t know how to do it.”

As Christensen later explained, this division between what and how is crucial but is overlooked in the professional world. It’s often straightforward to identify a strategy needed to achieve a goal, but what trips up companies is figuring out how to execute the strategy once identified. I came across this story in a foreword Christensen wrote for a book titled The 4 Disciplines of Execution, which built on extensive consulting case studies to describe four “disciplines” (abbreviated, 4DX) for helping companies successfully implement high-level strategies. What struck me as I read was that this gap between what and how was relevant to my personal quest to spend more time working deeply. Just as Andy Grove had identified the importance of competing in the low-end processor market, I had identified the importance of prioritizing depth. What I needed was help figuring out how to execute this strategy.

Intrigued by these parallels, I set out to adapt the 4DX framework to my personal work habits and ended up surprised by how helpful they proved in driving me toward effective action on my goal of working deeply. These ideas may have been forged for the world of big business, but the underlying concepts seem to apply anywhere that something important needs to get done against the backdrop of many competing obligations and distractions. With this in mind, I’ve summarized in the following sections the four disciplines of the 4DX framework, and for each I describe how I adapted it to the specific concerns of developing a deep work habit.

Discipline #1: Focus on the Wildly Important

As the authors of The 4 Disciplines of Execution explain, “The more you try to do, the less you actually accomplish.” They elaborate that execution should be aimed at a small number of “wildly important goals.” This simplicity will help focus an organization’s energy to a sufficient intensity to ignite real results.

For an individual focused on deep work, the implication is that you should identify a small number of ambitious outcomes to pursue with your deep work hours. The general exhortation to “spend more time working deeply” doesn’t spark a lot of enthusiasm. To instead have a specific goal that would return tangible and substantial professional benefits will generate a steadier stream of enthusiasm. In a 2014 column titled “The Art of Focus,” David Brooks endorsed this approach of letting ambitious goals drive focused behavior, explaining: “If you want to win the war for attention, don’t try to say ‘no’ to the trivial distractions you find on the information smorgasbord; try to say ‘yes’ to the subject that arouses a terrifying longing, and let the terrifying longing crowd out everything else.”

For example, when I first began experimenting with 4DX, I set the specific important goal of publishing five high-quality peer-reviewed papers in the upcoming academic year. This goal was ambitious, as it was more papers than I had been publishing, and there were tangible rewards attached to it (tenure review was looming). Combined, these two properties helped the goal stoke my motivation.

Discipline #2: Act on the Lead Measures

Once you’ve identified a wildly important goal, you need to measure your success. In 4DX, there are two types of metrics for this purpose: lag measures and lead measures. Lag measures describe the thing you’re ultimately trying to improve. For example, if your goal is to increase customer satisfaction in your bakery, then the relevant lag measure is your customer satisfaction scores. As the 4DX authors explain, the problem with lag measures is that they come too late to change your behavior: “When you receive them, the performance that drove them is already in the past.”

Lead measures, on the other hand, “measure the new behaviors that will drive success on the lag measures.” In the bakery example, a good lead measure might be the number of customers who receive free samples. This is a number you can directly increase by giving out more samples. As you increase this number, your lag measures will likely eventually improve as well. In other words, lead measures turn your attention to improving the behaviors you directly control in the near future that will then have a positive impact on your long-term goals.

For an individual focused on deep work, it’s easy to identify the relevant lead measure: time spent in a state of deep work dedicated toward your wildly important goal. Returning to my example, this insight had an important impact on how I directed my academic research. I used to focus on lag measures, such as papers published per year. These measures, however, lacked influence on my day-to-day behavior because there was nothing I could do in the short term that could immediately generate a noticeable change to this long-term metric. When I shifted to tracking deep work hours, suddenly these measures became relevant to my day-to-day: Every hour extra of deep work was immediately reflected in my tally.

Discipline #3: Keep a Compelling Scoreboard

“People play differently when they’re keeping score,” the 4DX authors explain. They then elaborate that when attempting to drive your team’s engagement toward your organization’s wildly important goal, it’s important that they have a public place to record and track their lead measures. This scoreboard creates a sense of competition that drives them to focus on these measures, even when other demands vie for their attention. It also provides a reinforcing source of motivation. Once the team notices their success with a lead measure, they become invested in perpetuating this performance.

In the preceding discipline, I argued that for an individual focused on deep work, hours spent working deeply should be the lead measure. It follows, therefore, that the individual’s scoreboard should be a physical artifact in the workspace that displays the individual’s current deep work hour count.

In my early experiments with 4DX, I settled on a simple but effective solution for implementing this scoreboard. I took a piece of card stock and divided it into rows, one for each week of the current semester. I then labeled each row with the dates of the week and taped it to the wall next to my computer monitor (where it couldn’t be ignored). As each week progressed, I kept track of the hours spent in deep work that week with a simple tally of tick marks in that week’s row. To maximize the motivation generated by this scoreboard, whenever I reached an important milestone in an academic paper (e.g., solving a key proof), I would circle the tally mark corresponding to the hour where I finished the result.* This served two purposes. First, it allowed me to connect, at a visceral level, accumulated deep work hours and tangible results. Second, it helped calibrate my expectations for how many hours of deep work were needed per result. This reality (which was larger than I first assumed) helped spur me to squeeze more such hours into each week.

Discipline #4: Create a Cadence of Accountability

The 4DX authors elaborate that the final step to help maintain a focus on lead measures is to put in place “a rhythm of regular and frequent meetings of any team that owns a wildly important goal.” During these meetings, the team members must confront their scoreboard, commit to specific actions to help improve the score before the next meeting, and describe what happened with the commitments they made at the last meeting. They note that this review can be condensed to only a few minutes, but it must be regular for its effect to be felt. The authors argue that it’s this discipline where “execution really happens.”

For an individual focused on his or her own deep work habit, there’s likely no team to meet with, but this doesn’t exempt you from the need for regular accountability. In multiple places throughout this book I discuss and recommend the habit of a weekly review in which you make a plan for the workweek ahead (see Rule #4). During my experiments with 4DX, I used a weekly review to look over my scoreboard to celebrate good weeks, help understand what led to bad weeks, and most important, figure out how to ensure a good score for the days ahead. This led me to adjust my schedule to meet the needs of my lead measure - enabling significantly more deep work than if I had avoided such reviews altogether.

The 4DX framework is based on the fundamental premise that execution is more difficult than strategizing. After hundreds and hundreds of case studies, its inventors managed to isolate a few basic disciplines that seem to work particularly well in conquering this difficulty. It’s no surprise, therefore, that these same disciplines can have a similar effect on your personal goal of cultivating a deep work habit.

To conclude, let’s return one last time to my own example. As I noted earlier, when I first embraced 4DX I adopted the goal of publishing five peer-reviewed papers in the 2013–2014 academic year. This was an ambitious goal given that I had published only four papers the previous year (a feat I was proud of). Throughout this 4DX experiment, the clarity of this goal, coupled with the simple but unavoidable feedback of my lead measure scoreboard, pushed me to a level of depth I hadn’t before achieved. In retrospect, it was not so much the intensity of my deep work periods that increased, but instead their regularity. Whereas I used to cluster my deep thinking near paper submission deadlines, the 4DX habit kept my mind concentrated throughout the full year. It ended up, I must admit, an exhausting year (especially given that I was writing this book at the same time). But it also turned out to produce a convincing endorsement for the 4DX framework: By the summer of 2014, I had nine full papers accepted for publication, more than doubling what I had managed to accomplish in any preceding year.

Be Lazy

In a 2012 article written for a New York Times blog, the essayist and cartoonist Tim Kreider provided a memorable self-description: “I am not busy. I am the laziest ambitious person I know.” Kreider’s distaste for frenetic work, however, was put to the test in the months leading up to the writing of his post. Here’s his description of the period: “I’ve insidiously started, because of professional obligations, to become busy… every morning my in-box was full of e-mails asking me to do things I did not want to do or presenting me with problems that I now had to solve.”

His solution? He fled to what he calls an “undisclosed location”: a place with no TV and no Internet (going online requires a bike ride to the local library), and where he could remain nonresponsive to the pinprick onslaught of small obligations that seem harmless in isolation but aggregate to serious injury to his deep work habit. “I’ve remembered about buttercups, stink bugs and the stars,” Kreider says about his retreat from activity. “I read. And I’m finally getting some real writing done for the first time in months.”

It’s important for our purposes to recognize that Kreider is no Thoreau. He didn’t retreat from the world of busyness to underscore a complicated social critique. His move to an undisclosed location was instead motivated by a surprising but practical insight: It made him better at his job. Here’s Kreider’s explanation:

Idleness is not just a vacation, an indulgence or a vice; it is as indispensable to the brain as vitamin D is to the body, and deprived of it we suffer a mental affliction as disfiguring as rickets… it is, paradoxically, necessary to getting any work done.

When Kreider talks of getting work done, of course, he’s not referencing shallow tasks. For the most part, the more time you can spend immersed in shallow work the more of it that gets accomplished. As a writer and artist, however, Kreider is instead concerned with deep work - the serious efforts that produce things the world values. These efforts, he’s convinced, need the support of a mind regularly released to leisure.

This strategy argues that you should follow Kreider’s lead by injecting regular and substantial freedom from professional concerns into your day, providing you with the idleness paradoxically required to get (deep) work done. There are many ways to accomplish this goal. You could, for example, use Kreider’s approach of retreating from the world of shallow tasks altogether by hiding out in an “undisclosed location,” but this isn’t practical for most people. Instead, I want to suggest a more applicable but still quite powerful heuristic: At the end of the workday, shut down your consideration of work issues until the next morning - no after-dinner e-mail check, no mental replays of conversations, and no scheming about how you’ll handle an upcoming challenge; shut down work thinking completely. If you need more time, then extend your workday, but once you shut down, your mind must be left free to encounter Kreider’s buttercups, stink bugs, and stars.

Before describing some tactics that support this strategy, I want to first explore why a shutdown will be profitable to your ability to produce valuable output. We have, of course, Tim Kreider’s personal endorsement, but it’s worth taking the time to also understand the science behind the value of downtime. A closer examination of this literature reveals the following three possible explanations for this value.

Reason #1: Downtime Aids Insights

The scientific literature has emphasized the benefits of conscious deliberation in decision making for hundreds of years… The question addressed here is whether this view is justified. We hypothesize that it is not.

Lurking in this bland statement is a bold claim. The authors of this study, led by the Dutch psychologist Ap Dijksterhuis, set out to prove that some decisions are better left to your unconscious mind to untangle. In other words, to actively try to work through these decisions will lead to a worse outcome than loading up the relevant information and then moving on to something else while letting the subconscious layers of your mind mull things over.

Dijksterhuis’s team isolated this effect by giving subjects the information needed for a complex decision regarding a car purchase. Half the subjects were told to think through the information and then make the best decision. The other half were distracted by easy puzzles after they read the information, and were then put on the spot to make a decision without having had time to consciously deliberate. The distracted group ended up performing better.

Observations from experiments such as this one led Dijksterhuis and his collaborators to introduce unconscious thought theory (UTT) - an attempt to understand the different roles conscious and unconscious deliberation play in decision making. At a high level, this theory proposes that for decisions that require the application of strict rules, the conscious mind must be involved. For example, if you need to do a math calculation, only your conscious mind is able to follow the precise arithmetic rules needed for correctness. On the other hand, for decisions that involve large amounts of information and multiple vague, and perhaps even conflicting, constraints, your unconscious mind is well suited to tackle the issue. UTT hypothesizes that this is due to the fact that these regions of your brain have more neuronal bandwidth available, allowing them to move around more information and sift through more potential solutions than your conscious centers of thinking. Your conscious mind, according to this theory, is like a home computer on which you can run carefully written programs that return correct answers to limited problems, whereas your unconscious mind is like Google’s vast data centers, in which statistical algorithms sift through terabytes of unstructured information, teasing out surprising useful solutions to difficult questions.

The implication of this line of research is that providing your conscious brain time to rest enables your unconscious mind to take a shift sorting through your most complex professional challenges. A shutdown habit, therefore, is not necessarily reducing the amount of time you’re engaged in productive work, but is instead diversifying the type of work you deploy.

Reason #2: Downtime Helps Recharge the Energy Needed to Work Deeply

A frequently cited 2008 paper appearing in the journal Psychological Science describes a simple experiment. Subjects were split into two groups. One group was asked to take a walk on a wooded path in an arboretum near the Ann Arbor, Michigan, campus where the study was conducted. The other group was sent on a walk through the bustling center of the city. Both groups were then given a concentration-sapping task called backward digit-span. The core finding of the study is that the nature group performed up to 20 percent better on the task. The nature advantage still held the next week when the researchers brought back the same subjects and switched the locations: It wasn’t the people who determined performance, but whether or not they got a chance to prepare by walking through the woods.

This study is one of many that validate attention restoration theory (ART), which claims that spending time in nature can improve your ability to concentrate. This theory, which was first proposed in the 1980s by the University of Michigan psychologists Rachel Kaplan and Stephen Kaplan (the latter of which co-authored the 2008 study discussed here, along with Marc Berman and John Jonides), is based on the concept of attention fatigue. To concentrate requires what ART calls directed attention. This resource is finite: If you exhaust it, you’ll struggle to concentrate. (For our purposes, we can think of this resource as the same thing as Baumeister’s limited willpower reserves we discussed in the introduction to this rule.*) The 2008 study argues that walking on busy city streets requires you to use directed attention, as you must navigate complicated tasks like figuring out when to cross a street to not get run over, or when to maneuver around the slow group of tourists blocking the sidewalk. After just fifty minutes of this focused navigation, the subject’s store of directed attention was low.

Walking through nature, by contrast, exposes you to what lead author Marc Berman calls “inherently fascinating stimuli,” using sunsets as an example. These stimuli “invoke attention modestly, allowing focused-attention mechanisms a chance to replenish.” Put another way, when walking through nature, you’re freed from having to direct your attention, as there are few challenges to navigate (like crowded street crossings), and experience enough interesting stimuli to keep your mind sufficiently occupied to avoid the need to actively aim your attention. This state allows your directed attention resources time to replenish. After fifty minutes of such replenishment, the subjects enjoyed a boost in their concentration.

(You might, of course, argue that perhaps being outside watching a sunset puts people in a good mood, and being in a good mood is what really helps performance on these tasks. But in a sadistic twist, the researchers debunked that hypothesis by repeating the experiment in the harsh Ann Arbor winter. Walking outside in brutal cold conditions didn’t put the subjects in a good mood, but they still ended up doing better on concentration tasks.)

What’s important to our purpose is observing that the implications of ART expand beyond the benefits of nature. The core mechanism of this theory is the idea that you can restore your ability to direct your attention if you give this activity a rest. Walking in nature provides such a mental respite, but so, too, can any number of relaxing activities so long as they provide similar “inherently fascinating stimuli” and freedom from directed concentration. Having a casual conversation with a friend, listening to music while making dinner, playing a game with your kids, going for a run - the types of activities that will fill your time in the evening if you enforce a work shutdown - play the same attention-restoring role as walking in nature.

On the other hand, if you keep interrupting your evening to check and respond to e-mail, or put aside a few hours after dinner to catch up on an approaching deadline, you’re robbing your directed attention centers of the uninterrupted rest they need for restoration. Even if these work dashes consume only a small amount of time, they prevent you from reaching the levels of deeper relaxation in which attention restoration can occur. Only the confidence that you’re done with work until the next day can convince your brain to downshift to the level where it can begin to recharge for the next day to follow. Put another way, trying to squeeze a little more work out of your evenings might reduce your effectiveness the next day enough that you end up getting less done than if you had instead respected a shutdown.

Reason #3: The Work That Evening Downtime Replaces Is Usually Not That Important

The final argument for maintaining a clear endpoint to your workday requires us to return briefly to Anders Ericsson, the inventor of deliberate practice theory. As you might recall from Part 1, deliberate practice is the systematic stretching of your ability for a given skill. It is the activity required to get better at something. Deep work and deliberate practice, as I’ve argued, overlap substantially. For our purposes here we can use deliberate practice as a general-purpose stand-in for cognitively demanding efforts.

In Ericsson’s seminal 1993 paper on the topic, titled “The Role of Deliberate Practice in the Acquisition of Expert Performance,” he dedicates a section to reviewing what the research literature reveals about an individual’s capacity for cognitively demanding work. Ericsson notes that for a novice, somewhere around an hour a day of intense concentration seems to be a limit, while for experts this number can expand to as many as four hours - but rarely more.

One of the studies cited, for example, catalogs the practice habits of a group of elite violin players training at Berlin’s Universität der Künste. This study found the elite players average around three and a half hours per day in a state of deliberate practice, usually separated into two distinct periods. The less accomplished players spent less time in a state of depth.

The implication of these results is that your capacity for deep work in a given day is limited. If you’re careful about your schedule (using, for example, the type of productivity strategies described in Rule #4), you should hit your daily deep work capacity during your workday. It follows, therefore, that by evening, you’re beyond the point where you can continue to effectively work deeply. Any work you do fit into the night, therefore, won’t be the type of high-value activities that really advance your career; your efforts will instead likely be confined to low-value shallow tasks (executed at a slow, low-energy pace). By deferring evening work, in other words, you’re not missing out on much of importance.

The three reasons just described support the general strategy of maintaining a strict endpoint to your workday. Let’s conclude by filling in some details concerning implementation.

To succeed with this strategy, you must first accept the commitment that once your workday shuts down, you cannot allow even the smallest incursion of professional concerns into your field of attention. This includes, crucially, checking e-mail, as well as browsing work-related websites. In both cases, even a brief intrusion of work can generate a self-reinforcing stream of distraction that impedes the shutdown advantages described earlier for a long time to follow (most people are familiar, for example, with the experience of glancing at an alarming e-mail on a Saturday morning and then having its implications haunt your thoughts for the rest of the weekend).

Another key commitment for succeeding with this strategy is to support your commitment to shutting down with a strict shutdown ritual that you use at the end of the workday to maximize the probability that you succeed. In more detail, this ritual should ensure that every incomplete task, goal, or project has been reviewed and that for each you have confirmed that either (1) you have a plan you trust for its completion, or (2) it’s captured in a place where it will be revisited when the time is right. The process should be an algorithm: a series of steps you always conduct, one after another. When you’re done, have a set phrase you say that indicates completion (to end my own ritual, I say, “Shutdown complete”). This final step sounds cheesy, but it provides a simple cue to your mind that it’s safe to release work-related thoughts for the rest of the day.

To make this suggestion more concrete, let me walk through the steps of my own shutdown ritual (which I first developed around the time I was writing my doctoral dissertation, and have deployed, in one form or another, ever since). The first thing I do is take a final look at my e-mail inbox to ensure that there’s nothing requiring an urgent response before the day ends. The next thing I do is transfer any new tasks that are on my mind or were scribbled down earlier in the day into my official task lists. (I use Google Docs for storing my task lists, as I like the ability to access them from any computer - but the technology here isn’t really relevant.) Once I have these task lists open, I quickly skim every task in every list, and then look at the next few days on my calendar. These two actions ensure that there’s nothing urgent I’m forgetting or any important deadlines or appointments sneaking up on me. I have, at this point, reviewed everything that’s on my professional plate. To end the ritual, I use this information to make a rough plan for the next day. Once the plan is created, I say, “Shutdown complete,” and my work thoughts are done for the day.

The concept of a shutdown ritual might at first seem extreme, but there’s a good reason for it: the Zeigarnik effect. This effect, which is named for the experimental work of the early-twentieth-century psychologist Bluma Zeigarnik, describes the ability of incomplete tasks to dominate our attention. It tells us that if you simply stop whatever you are doing at five p.m. and declare, “I’m done with work until tomorrow,” you’ll likely struggle to keep your mind clear of professional issues, as the many obligations left unresolved in your mind will, as in Bluma Zeigarnik’s experiments, keep battling for your attention throughout the evening (a battle that they’ll often win).

At first, this challenge might seem unresolvable. As any busy knowledge worker can attest, there are always tasks left incomplete. The idea that you can ever reach a point where all your obligations are handled is a fantasy. Fortunately, we don’t need to complete a task to get it off our minds. Riding to our rescue in this matter is our friend from earlier in the rule, the psychologist Roy Baumeister, who wrote a paper with E.J. Masicampo playfully titled “Consider It Done!” In this study, the two researchers began by replicating the Zeigarnik effect in their subjects (in this case, the researchers assigned a task and then cruelly engineered interruptions), but then found that they could significantly reduce the effect’s impact by asking the subjects, soon after the interruption, to make a plan for how they would later complete the incomplete task. To quote the paper: “Committing to a specific plan for a goal may therefore not only facilitate attainment of the goal but may also free cognitive resources for other pursuits.”

The shutdown ritual described earlier leverages this tactic to battle the Zeigarnik effect. While it doesn’t force you to explicitly identify a plan for every single task in your task list (a burdensome requirement), it does force you to capture every task in a common list, and then review these tasks before making a plan for the next day. This ritual ensures that no task will be forgotten: Each will be reviewed daily and tackled when the time is appropriate. Your mind, in other words, is released from its duty to keep track of these obligations at every moment - your shutdown ritual has taken over that responsibility.

Shutdown rituals can become annoying, as they add an extra ten to fifteen minutes to the end of your workday (and sometimes even more), but they’re necessary for reaping the rewards of systematic idleness summarized previously. From my experience, it should take a week or two before the shutdown habit sticks - that is, until your mind trusts your ritual enough to actually begin to release work-related thoughts in the evening. But once it does stick, the ritual will become a permanent fixture in your life - to the point that skipping the routine will fill you with a sense of unease.

Decades of work from multiple different subfields within psychology all point toward the conclusion that regularly resting your brain improves the quality of your deep work. When you work, work hard. When you’re done, be done. Your average e-mail response time might suffer some, but you’ll more than make up for this with the sheer volume of truly important work produced during the day by your refreshed ability to dive deeper than your exhausted peers.

Rule #2 - Embrace Boredom

To better understand how one masters the art of deep work, I suggest visiting the Knesses Yisroel Synagogue in Spring Valley, New York, at six a.m. on a weekday morning. If you do, you’ll likely find at least twenty cars in the parking lot. Inside, you’ll encounter a couple dozen members of the congregation working over texts - some might be reading silently, mouthing the words of an ancient language, while others are paired together debating. At one end of the room a rabbi will be leading a larger group in a discussion. This early morning gathering in Spring Valley represents just a small fraction of the hundreds of thousands of orthodox Jews who will wake up early that morning, as they do every weekday morning, to practice a central tenet of their faith: to spend time every day studying the complex written traditions of Rabbinic Judaism.

I was introduced to this world by Adam Marlin, a member of the Knesses Yisroel congregation and one of the regulars at its morning study group. As Marlin explained to me, his goal with this practice is to decipher one Talmud page each day (though he sometimes fails to make it even this far), often working with a chevruta (study partner) to push his understanding closer to his cognitive limit.

What interests me about Marlin is not his knowledge of ancient texts, but instead the type of effort required to gain this knowledge. When I interviewed him, he emphasized the mental intensity of his morning ritual. “It’s an extreme and serious discipline, consisting mostly of the ‘deep work’ stuff [you write about],” he explained. “I run a growing business, but this is often the hardest brain strain I do.” This strain is not unique to Marlin but is instead ingrained in the practice - as his rabbi once explained to him: “You cannot consider yourself as fulfilling this daily obligation unless you have stretched to the reaches of your mental capacity.”

Unlike many orthodox Jews, Marlin came late to his faith, not starting his rigorous Talmud training until his twenties. This bit of trivia proves useful to our purposes because it allows Marlin a clear before-and-after comparison concerning the impact of these mental calisthenics - and the result surprised him. Though Marlin was exceptionally well educated when he began the practice - he holds three different Ivy League degrees - he soon met fellow adherents who had only ever attended small religious schools but could still “dance intellectual circles” around him. “A number of these people are highly successful [professionally],” he explained to me, “but it wasn’t some fancy school that pushed their intellect higher; it became clear it was instead their daily study that started as early as the fifth grade.”

After a while, Marlin began to notice positive changes in his own ability to think deeply. “I’ve recently been making more highly creative insights in my business life,” he told me. “I’m convinced it’s related to this daily mental practice. This consistent strain has built my mental muscle over years and years. This was not the goal when I started, but it is the effect.”

Adam Marlin’s experience underscores an important reality about deep work: The ability to concentrate intensely is a skill that must be trained. This idea might sound obvious once it’s pointed out, but it represents a departure from how most people understand such matters. In my experience, it’s common to treat undistracted concentration as a habit like flossing - something that you know how to do and know is good for you, but that you’ve been neglecting due to a lack of motivation. This mind-set is appealing because it implies you can transform your working life from distracted to focused overnight if you can simply muster enough motivation. But this understanding ignores the difficulty of focus and the hours of practice necessary to strengthen your “mental muscle.” The creative insights that Adam Marlin now experiences in his professional life, in other words, have little to do with a onetime decision to think deeper, and much to do with a commitment to training this ability early every morning.

There is, however, an important corollary to this idea: Efforts to deepen your focus will struggle if you don’t simultaneously wean your mind from a dependence on distraction. Much in the same way that athletes must take care of their bodies outside of their training sessions, you’ll struggle to achieve the deepest levels of concentration if you spend the rest of your time fleeing the slightest hint of boredom.

We can find evidence for this claim in the research of Clifford Nass, the late Stanford communications professor who was well known for his study of behavior in the digital age. Among other insights, Nass’s research revealed that constant attention switching online has a lasting negative effect on your brain. Here’s Nass summarizing these findings in a 2010 interview with NPR’s Ira Flatow:

So we have scales that allow us to divide up people into people who multitask all the time and people who rarely do, and the differences are remarkable. People who multitask all the time can’t filter out irrelevancy. They can’t manage a working memory. They’re chronically distracted. They initiate much larger parts of their brain that are irrelevant to the task at hand… they’re pretty much mental wrecks.

At this point Flatow asks Nass whether the chronically distracted recognize this rewiring of their brain:

The people we talk with continually said, “look, when I really have to concentrate, I turn off everything and I am laser-focused.” And unfortunately, they’ve developed habits of mind that make it impossible for them to be laser-focused. They’re suckers for irrelevancy. They just can’t keep on task. [emphasis mine]

Once your brain has become accustomed to on-demand distraction, Nass discovered, it’s hard to shake the addiction even when you want to concentrate. To put this more concretely: If every moment of potential boredom in your life - say, having to wait five minutes in line or sit alone in a restaurant until a friend arrives - is relieved with a quick glance at your smartphone, then your brain has likely been rewired to a point where, like the “mental wrecks” in Nass’s research, it’s not ready for deep work - even if you regularly schedule time to practice this concentration.

Rule #1 taught you how to integrate deep work into your schedule and support it with routines and rituals designed to help you consistently reach the current limit of your concentration ability. Rule #2 will help you significantly improve this limit. The strategies that follow are motivated by the key idea that getting the most out of your deep work habit requires training, and as clarified previously, this training must address two goals: improving your ability to concentrate intensely and overcoming your desire for distraction. These strategies cover a variety of approaches, from quarantining distraction to mastering a special form of meditation, that combine to provide a practical road map for your journey from a mind wrecked by constant distraction and unfamiliar with concentration, to an instrument that truly does deliver laser-like focus.

Don’t Take Breaks from Distraction. Instead Take Breaks from Focus.

Many assume that they can switch between a state of distraction and one of concentration as needed, but as I just argued, this assumption is optimistic: Once you’re wired for distraction, you crave it. Motivated by this reality, this strategy is designed to help you rewire your brain to a configuration better suited to staying on task.

Before diving into the details, let’s start by considering a popular suggestion for distraction addiction that doesn’t quite solve our problem: the Internet Sabbath (sometimes called a digital detox). In its basic form, this ritual asks you to put aside regular time - typically, one day a week - where you refrain from network technology. In the same way that the Sabbath in the Hebrew Bible induces a period of quiet and reflection well suited to appreciate God and his works, the Internet Sabbath is meant to remind you of what you miss when you are glued to a screen.

It’s unclear who first introduced the Internet Sabbath concept, but credit for popularizing the idea often goes to the journalist William Powers, who promoted the practice in his 2010 reflection on technology and human happiness, Hamlet’s BlackBerry. As Powers later summarizes in an interview: “Do what Thoreau did, which is learn to have a little disconnectedness within the connected world - don’t run away.”

A lot of advice for the problem of distraction follows this general template of finding occasional time to get away from the clatter. Some put aside one or two months a year to escape these tethers, others follow Powers’s one-day-a-week advice, while others put aside an hour or two every day for the same purpose. All forms of this advice provide some benefit, but once we see the distraction problem in terms of brain wiring, it becomes clear that an Internet Sabbath cannot by itself cure a distracted brain. If you eat healthy just one day a week, you’re unlikely to lose weight, as the majority of your time is still spent gorging. Similarly, if you spend just one day a week resisting distraction, you’re unlikely to diminish your brain’s craving for these stimuli, as most of your time is still spent giving in to it.

I propose an alternative to the Internet Sabbath. Instead of scheduling the occasional break from distraction so you can focus, you should instead schedule the occasional break from focus to give in to distraction. To make this suggestion more concrete, let’s make the simplifying assumption that Internet use is synonymous with seeking distracting stimuli. (You can, of course, use the Internet in a way that’s focused and deep, but for a distraction addict, this is a difficult task.) Similarly, let’s consider working in the absence of the Internet to be synonymous with more focused work. (You can, of course, find ways to be distracted without a network connection, but these tend to be easier to resist.)

With these rough categorizations established, the strategy works as follows: Schedule in advance when you’ll use the Internet, and then avoid it altogether outside these times. I suggest that you keep a notepad near your computer at work. On this pad, record the next time you’re allowed to use the Internet. Until you arrive at that time, absolutely no network connectivity is allowed - no matter how tempting.

The idea motivating this strategy is that the use of a distracting service does not, by itself, reduce your brain’s ability to focus. It’s instead the constant switching from low-stimuli/high-value activities to high-stimuli/low-value activities, at the slightest hint of boredom or cognitive challenge, that teaches your mind to never tolerate an absence of novelty. This constant switching can be understood analogously as weakening the mental muscles responsible for organizing the many sources vying for your attention. By segregating Internet use (and therefore segregating distractions) you’re minimizing the number of times you give in to distraction, and by doing so you let these attention-selecting muscles strengthen.

For example, if you’ve scheduled your next Internet block thirty minutes from the current moment, and you’re beginning to feel bored and crave distraction, the next thirty minutes of resistance become a session of concentration calisthenics. A full day of scheduled distraction therefore becomes a full day of similar mental training.

While the basic idea behind this strategy is straightforward, putting it into practice can be tricky. To help you succeed, here are three important points to consider.

Point #1: This strategy works even if your job requires lots of Internet use and/or prompt e-mail replies.

If you’re required to spend hours every day online or answer e-mails quickly, that’s fine: This simply means that your Internet blocks will be more numerous than those of someone whose job requires less connectivity. The total number or duration of your Internet blocks doesn’t matter nearly as much as making sure that the integrity of your offline blocks remains intact.

Imagine, for example, that over a two-hour period between meetings, you must schedule an e-mail check every fifteen minutes. Further imagine that these checks require, on average, five minutes. It’s sufficient, therefore, to schedule an Internet block every fifteen minutes through this two-hour stretch, with the rest of the time dedicated to offline blocks. In this example, you’ll end up spending around ninety minutes out of this two-hour period in a state where you’re offline and actively resisting distraction. This works out to be a large amount of concentration training that’s achieved without requiring you to sacrifice too much connectivity.

Point #2: Regardless of how you schedule your Internet blocks, you must keep the time outside these blocks absolutely free from Internet use.

This objective is easy to state in principle but quickly becomes tricky in the messy reality of the standard workday. An inevitable issue you’ll face when executing this strategy is realizing early on in an offline block that there’s some crucial piece of information online that you need to retrieve to continue making progress on your current task. If your next Internet block doesn’t start for a while, you might end up stuck. The temptation in this situation is to quickly give in, look up the information, then return to your offline block. You must resist this temptation! The Internet is seductive: You may think you’re just retrieving a single key e-mail from your inbox, but you’ll find it hard to not glance at the other “urgent” messages that have recently arrived. It doesn’t take many of these exceptions before your mind begins to treat the barrier between Internet and offline blocks as permeable - diminishing the benefits of this strategy.

It’s crucial in this situation, therefore, that you don’t immediately abandon an offline block, even when stuck. If it’s possible, switch to another offline activity for the remainder of the current block (or perhaps even fill in this time relaxing). If this is infeasible - perhaps you need to get the current offline activity done promptly - then the correct response is to change your schedule so that your next Internet block begins sooner. The key in making this change, however, is to not schedule the next Internet block to occur immediately. Instead, enforce at least a five-minute gap between the current moment and the next time you can go online. This gap is minor, so it won’t excessively impede your progress, but from a behavioralist perspective, it’s substantial because it separates the sensation of wanting to go online from the reward of actually doing so.

Point #3: Scheduling Internet use at home as well as at work can further improve your concentration training.

If you find yourself glued to a smartphone or laptop throughout your evenings and weekends, then it’s likely that your behavior outside of work is undoing many of your attempts during the workday to rewire your brain (which makes little distinction between the two settings). In this case, I would suggest that you maintain the strategy of scheduling Internet use even after the workday is over.

To simplify matters, when scheduling Internet use after work, you can allow time-sensitive communication into your offline blocks (e.g., texting with a friend to agree on where you’ll meet for dinner), as well as time-sensitive information retrieval (e.g., looking up the location of the restaurant on your phone). Outside of these pragmatic exceptions, however, when in an offline block, put your phone away, ignore texts, and refrain from Internet usage. As in the workplace variation of this strategy, if the Internet plays a large and important role in your evening entertainment, that’s fine: Schedule lots of long Internet blocks. The key here isn’t to avoid or even to reduce the total amount of time you spend engaging in distracting behavior, but is instead to give yourself plenty of opportunities throughout your evening to resist switching to these distractions at the slightest hint of boredom.

One place where this strategy becomes particularly difficult outside work is when you’re forced to wait (for example, standing in line at a store). It’s crucial in these situations that if you’re in an offline block, you simply gird yourself for the temporary boredom, and fight through it with only the company of your thoughts. To simply wait and be bored has become a novel experience in modern life, but from the perspective of concentration training, it’s incredibly valuable.

To summarize, to succeed with deep work you must rewire your brain to be comfortable resisting distracting stimuli. This doesn’t mean that you have to eliminate distracting behaviors; it’s sufficient that you instead eliminate the ability of such behaviors to hijack your attention. The simple strategy proposed here of scheduling Internet blocks goes a long way toward helping you regain this attention autonomy.

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Work Like Teddy Roosevelt

If you attended Harvard College during the 1876–1877 school year, you would’ve likely noticed a wiry, mutton-chopped, brash, and impossibly energetic freshman named Theodore Roosevelt. If you then proceeded to befriend this young man, you would’ve soon noticed a paradox.

On the one hand, his attention might appear to be hopelessly scattered, spread over what one classmate called an “amazing array of interests” - a list that biographer Edmund Morris catalogs to contain boxing, wrestling, body building, dance lessons, poetry readings, and the continuation of a lifelong obsession with naturalism (Roosevelt’s landlord on Winthrop Street was not pleased with her young tenant’s tendency to dissect and stuff specimens in his rented room). This latter interest developed to the point that Roosevelt published his first book, The Summer Birds of the Adirondacks, in the summer after his freshman year. It was well received in the Bulletin of the Nuttall Ornithological Club - a publication, needless to say, which takes bird books quite seriously - and was good enough to lead Morris to assess Roosevelt, at this young age, to be “one of the most knowledgeable young naturalists in the United States.”

To support this extracurricular exuberance Roosevelt had to severely restrict the time left available for what should have been his primary focus: his studies at Harvard. Morris used Roosevelt’s diary and letters from this period to estimate that the future president was spending no more than a quarter of the typical day studying. One might expect therefore that Roosevelt’s grades would crater. But they didn’t. He wasn’t the top student in his class, but he certainly didn’t struggle either: In his freshman year he earned honor grades in five out of his seven courses. The explanation for this Roosevelt paradox turns out to be his unique approach to tackling this schoolwork. Roosevelt would begin his scheduling by considering the eight hours from eight thirty a.m. to four thirty p.m. He would then remove the time spent in recitation and classes, his athletic training (which was once a day), and lunch. The fragments that remained were then considered time dedicated exclusively to studying. As noted, these fragments didn’t usually add up to a large number of total hours, but he would get the most out of them by working only on schoolwork during these periods, and doing so with a blistering intensity. “The amount of time he spent at his desk was comparatively small,” explained Morris, “but his concentration was so intense, and his reading so rapid, that he could afford more time off [from schoolwork] than most.”

This strategy asks you to inject the occasional dash of Rooseveltian intensity into your own workday. In particular, identify a deep task (that is, something that requires deep work to complete) that’s high on your priority list. Estimate how long you’d normally put aside for an obligation of this type, then give yourself a hard deadline that drastically reduces this time. If possible, commit publicly to the deadline - for example, by telling the person expecting the finished project when they should expect it. If this isn’t possible (or if it puts your job in jeopardy), then motivate yourself by setting a countdown timer on your phone and propping it up where you can’t avoid seeing it as you work.

At this point, there should be only one possible way to get the deep task done in time: working with great intensity - no e-mail breaks, no daydreaming, no Facebook browsing, no repeated trips to the coffee machine. Like Roosevelt at Harvard, attack the task with every free neuron until it gives way under your unwavering barrage of concentration.

Try this experiment no more than once a week at first - giving your brain practice with intensity, but also giving it (and your stress levels) time to rest in between. Once you feel confident in your ability to trade concentration for completion time, increase the frequency of these Roosevelt dashes. Remember, however, to always keep your self-imposed deadlines right at the edge of feasibility. You should be able to consistently beat the buzzer (or at least be close), but to do so should require teeth-gritting concentration.

The main motivation for this strategy is straightforward. Deep work requires levels of concentration well beyond where most knowledge workers are comfortable. Roosevelt dashes leverage artificial deadlines to help you systematically increase the level you can regularly achieve - providing, in some sense, interval training for the attention centers of your brain. An additional benefit is that these dashes are incompatible with distraction (there’s no way you can give in to distraction and still make your deadlines). Therefore, every completed dash provides a session in which you’re potentially bored, and really want to seek more novel stimuli - but you resist. As argued in the previous strategy, the more you practice resisting such urges, the easier such resistance becomes.

After a few months of deploying this strategy, your understanding of what it means to focus will likely be transformed as you reach levels of intensity stronger than anything you’ve experienced before. And if you’re anything like a young Roosevelt, you can then repurpose the extra free time it generates toward the finer pleasures in life, like trying to impress the always-discerning members of the Nuttall Ornithological Club.

Meditate Productively

During the two years I spent as a postdoctoral associate at MIT, my wife and I lived in a small but charming apartment on Pinckney Street, in historic Beacon Hill. Though I lived in Boston and worked in Cambridge, the two locations were close - only a mile apart, sitting on opposite banks of the Charles River. Intent on staying fit, even during the long and dark New England winter, I decided to take advantage of this proximity by traveling between home and work, to the greatest extent possible, on foot.

My routine had me walk to campus in the morning, crossing the Longfellow Bridge in all weather (the city, it turns out to my dismay, is often slow to shovel the pedestrian path after snowstorms). Around lunch, I would change into running gear and run back home on a longer path that followed the banks of the Charles, crossing at the Massachusetts Avenue Bridge. After a quick lunch and shower at home, I would typically take the subway across the river on the way back to campus (saving, perhaps, a third of a mile on the trek), and then walk home when the workday was done. In other words, I spent a lot of time on my feet during this period. It was this reality that led me to develop the practice that I’ll now suggest you adopt in your own deep work training: productive meditation.

The goal of productive meditation is to take a period in which you’re occupied physically but not mentally - walking, jogging, driving, showering - and focus your attention on a single well-defined professional problem. Depending on your profession, this problem might be outlining an article, writing a talk, making progress on a proof, or attempting to sharpen a business strategy. As in mindfulness meditation, you must continue to bring your attention back to the problem at hand when it wanders or stalls.

I used to practice productive meditation in at least one of my daily cross-river treks while living in Boston, and as I improved, so did my results. I ended up, for example, working out the chapter outlines for a significant portion of my last book while on foot, and made progress on many knotty technical problems in my academic research.

I suggest that you adopt a productive meditation practice in your own life. You don’t necessarily need a serious session every day, but your goal should be to participate in at least two or three such sessions in a typical week. Fortunately, finding time for this strategy is easy, as it takes advantage of periods that would otherwise be wasted (such as walking the dog or commuting to work), and if done right, can actually increase your professional productivity instead of taking time away from your work. In fact, you might even consider scheduling a walk during your workday specifically for the purpose of applying productive meditation to your most pressing problem at the moment.

I’m not, however, suggesting this practice for its productivity benefits (though they’re nice). I’m instead interested in its ability to rapidly improve your ability to think deeply. In my experience, productive meditation builds on both of the key ideas introduced at the beginning of this rule. By forcing you to resist distraction and return your attention repeatedly to a well-defined problem, it helps strengthen your distraction-resisting muscles, and by forcing you to push your focus deeper and deeper on a single problem, it sharpens your concentration.

To succeed with productive meditation, it’s important to recognize that, like any form of meditation, it requires practice to do well. When I first attempted this strategy, back in the early weeks of my postdoc, I found myself hopelessly distracted - ending long stretches of “thinking” with little new to show for my efforts. It took me a dozen or so sessions before I began to experience real results. You should expect something similar, so patience will be necessary. To help accelerate this ramp-up process, however, I have two specific suggestions to offer.

Suggestion #1: Be Wary of Distractions and Looping

As a novice, when you begin a productive meditation session, your mind’s first act of rebellion will be to offer unrelated but seemingly more interesting thoughts. My mind, for example, was often successful at derailing my attention by beginning to compose an e-mail that I knew I needed to write. Objectively speaking, this train of thought sounds exceedingly dull, but in the moment it can become impossibly tantalizing. When you notice your attention slipping away from the problem at hand, gently remind yourself that you can return to that thought later, then redirect your attention back.

Distraction of this type, in many ways, is the obvious enemy to defeat in developing a productive meditation habit. A subtler, but equally effective adversary, is looping. When faced with a hard problem, your mind, as it was evolved to do, will attempt to avoid excess expenditure of energy when possible. One way it might attempt to sidestep this expenditure is by avoiding diving deeper into the problem by instead looping over and over again on what you already know about it. For example, when working on a proof, my mind has a tendency to rehash simple preliminary results, again and again, to avoid the harder work of building on these results toward the needed solution. You must be on your guard for looping, as it can quickly subvert an entire productive meditation session. When you notice it, remark to yourself that you seem to be in a loop, then redirect your attention toward the next step.

Suggestion #2: Structure Your Deep Thinking

“Thinking deeply” about a problem seems like a self-evident activity, but in reality it’s not. When faced with a distraction-free mental landscape, a hard problem, and time to think, the next steps can become surprisingly non-obvious. In my experience, it helps to have some structure for this deep thinking process. I suggest starting with a careful review of the relevant variables for solving the problem and then storing these values in your working memory. For example, if you’re working on the outline for a book chapter, the relevant variables might be the main points you want to make in the chapter. If you’re instead trying to solve a mathematics proof, these variables might be actual variables, or assumptions, or lemmas. Once the relevant variables are identified, define the specific next-step question you need to answer using these variables. In the book chapter example, this next-step question might be, “How am I going to effectively open this chapter?,” and for a proof it might be, “What can go wrong if I don’t assume this property holds?” With the relevant variables stored and the next-step question identified, you now have a specific target for your attention.

Assuming you’re able to solve your next-step question, the final step of this structured approach to deep thinking is to consolidate your gains by reviewing clearly the answer you identified. At this point, you can push yourself to the next level of depth by starting the process over. This cycle of reviewing and storing variables, identifying and tackling the next-step question, then consolidating your gains is like an intense workout routine for your concentration ability. It will help you get more out of your productive meditation sessions and accelerate the pace at which you improve your ability to go deep.

Memorize a Deck of Cards

Given just five minutes, Daniel Kilov can memorize any of the following: a shuffled deck of cards, a string of one hundred random digits, or 115 abstract shapes (this last feat establishing an Australian national record). It shouldn’t be surprising, therefore, that Kilov recently won back-to-back silver medals in the Australian memory championships. What is perhaps surprising, given Kilov’s history, is that he ended up a mental athlete at all.

“I wasn’t born with an exceptional memory,” Kilov told me. Indeed, during high school he considered himself forgetful and disorganized. He also struggled academically and was eventually diagnosed with attention deficit disorder. It was after a chance encounter with Tansel Ali, one of the country’s most successful and visible memory champions, that Kilov began to seriously train his memory. By the time he earned his college degree he had won his first national competition medal.

This transformation into a world-class mental athlete was rapid, but not unprecedented. In 2006, the American science writer Joshua Foer won the USA Memory Championship after only a year of (intense) training - a journey he chronicled in his 2011 bestseller, Moonwalking with Einstein. But what’s important to us about Kilov’s story is what happened to his academic performance during this period of intensive memory development. While training his brain, he went from a struggling student with attention deficit disorder to graduating from a demanding Australian university with first-class honors. He was soon accepted into the PhD program at one of the country’s top universities, where he currently studies under a renowned philosopher.

One explanation for this transformation comes from research led by Henry Roediger, who runs the Memory Lab at the University of Washington in Saint Louis. In 2014, Roediger and his collaborators sent a team, equipped with a battery of cognitive tests, to the Extreme Memory Tournament held in San Diego. They wanted to understand what differentiated these elite memorizers from the population at large. “We found that one of the biggest differences between memory athletes and the rest of us is in a cognitive ability that’s not a direct measure of memory at all but of attention,” explained Roediger in a New York Times blog post (emphasis mine). The ability in question is called “attentional control,” and it measures the subjects’ ability to maintain their focus on essential information.

A side effect of memory training, in other words, is an improvement in your general ability to concentrate. This ability can then be fruitfully applied to any task demanding deep work. Daniel Kilov, we can therefore conjecture, didn’t become a star student because of his award-winning memory; it was instead his quest to improve this memory that (incidentally) gave him the deep work edge needed to thrive academically.

The strategy described here asks you to replicate a key piece of Kilov’s training, and therefore gain some of the same improvements to your concentration. In particular, it asks you to learn a standard but quite impressive skill in the repertoire of most mental athletes: the ability to memorize a shuffled deck of cards.

The technique for card memorization I’ll teach you comes from someone who knows quite a bit about this particular challenge: Ron White, a former USA Memory Champion and world record holder in card memorization.* The first thing White emphasizes is that professional memory athletes never attempt rote memorization, that is, where you simply look at information again and again, repeating it in your head. This approach to retention, though popular among burned-out students, misunderstands how our brains work. We’re not wired to quickly internalize abstract information. We are, however, really good at remembering scenes. Think back to a recent memorable event in your life: perhaps attending the opening session of a conference or meeting a friend you haven’t seen in a while for a drink. Try to picture the scene as clearly as possible. Most people in this scenario can conjure a surprisingly vivid recollection of the event - even though you made no special effort to remember it at the time. If you systematically counted the unique details in this memory, the total number of items would likely be surprisingly numerous. Your mind, in other words, can quickly retain lots of detailed information - if it’s stored in the right way. Ron White’s card memorization technique builds on this insight.

To prepare for this high-volume memorization task, White recommends that you begin by cementing in your mind the mental image of walking through five rooms in your home. Perhaps you come in the door, walk through your front hallway, then turn into the downstairs bathroom, walk out the door and enter the guest bedroom, walk into the kitchen, and then head down the stairs into your basement. In each room, conjure a clear image of what you see.

Once you can easily recall this mental walkthrough of a well-known location, fix in your mind a collection of ten items in each of these rooms. White recommends that these items be large (and therefore more memorable), like a desk, not a pencil. Next, establish an order in which you look at each of these items in each room. For example, in the front hallway, you might look at the entry mat, then shoes on the floor by the mat, then the bench above the shoes, and so on. Combined this is only fifty items, so add two more items, perhaps in your backyard, to get to the full fifty-two items you’ll later need when connecting these images to all the cards in a standard deck.

Practice this mental exercise of walking through the rooms, and looking at items in each room, in a set order. You should find that this type of memorization, because it’s based on visual images of familiar places and things, will be much easier than the rote memorizing you might remember from your school days.

The second step in preparing to memorize a deck of cards is to associate a memorable person or thing with each of the fifty-two possible cards. To make this process easier, try to maintain some logical association between the card and the corresponding image. White provides the example of associating Donald Trump with the King of Diamonds, as diamonds signify wealth. Practice these associations until you can pull a card randomly from the deck and immediately recall the associated image. As before, the use of memorable visual images and associations will simplify the task of forming these connections.

The two steps mentioned previously are advance steps - things you do just once and can then leverage again and again in memorizing specific decks. Once these steps are done, you’re ready for the main event: memorizing as quickly as possible the order of fifty-two cards in a freshly shuffled deck. The method here is straightforward. Begin your mental walk-through of your house. As you encounter each item, look at the next card from the shuffled deck, and imagine the corresponding memorable person or thing doing something memorable near that item. For example, if the first item and location is the mat in your front entry, and the first card is the King of Diamonds, you might picture Donald Trump wiping mud off of his expensive loafers on the entry mat in your front hallway.

Proceed carefully through the rooms, associating the proper mental images with objects in the proper order. After you complete a room, you might want to walk through it a few times in a row to lock in the imagery. Once you’re done, you’re ready to hand the deck to a friend and amaze him by rattling off the cards in order without peeking. To do so, of course, simply requires that you perform the mental walk-through one more time, connecting each memorable person or thing to its corresponding card as you turn your attention to it.

If you practice this technique, you’ll discover, like many mental athletes who came before you, that you can eventually internalize a whole deck in just minutes. More important than your ability to impress friends, of course, is the training such activities provide your mind. Proceeding through the steps described earlier requires that you focus your attention, again and again, on a clear target. Like a muscle responding to weights, this will strengthen your general ability to concentrate - allowing you to go deeper with more ease.

It’s worth emphasizing, however, the obvious point that there’s nothing special about card memorization. Any structured thought process that requires unwavering attention can have a similar effect - be it studying the Talmud, like Adam Marlin from Rule #2’s introduction, or practicing productive meditation, or trying to learn the guitar part of a song by ear (a past favorite of mine). If card memorization seems weird to you, in other words, then choose a replacement that makes similar cognitive requirements. The key to this strategy is not the specifics, but instead the motivating idea that your ability to concentrate is only as strong as your commitment to train it.

Rule #3 - Quit Social Media

In 2013, author and digital media consultant Baratunde Thurston launched an experiment. He decided to disconnect from his online life for twenty-five days: no Facebook, no Twitter, no Foursquare (a service that awarded him “Mayor of the Year” in 2011), not even e-mail. He needed the break. Thurston, who is described by friends as “the most connected man in the world,” had by his own count participated in more than fifty-nine thousand Gmail conversations and posted fifteen hundred times on his Facebook wall in the year leading up to his experiment. “I was burnt out. Fried. Done. Toast,” he explained.

We know about Thurston’s experiment because he wrote about it in a cover article for Fast Company magazine, ironically titled “#UnPlug.” As Thurston reveals in the article, it didn’t take long to adjust to a disconnected life. “By the end of that first week, the quiet rhythm of my days seemed far less strange,” he said. “I was less stressed about not knowing new things; I felt that I still existed despite not having shared documentary evidence of said existence on the Internet.” Thurston struck up conversations with strangers. He enjoyed food without Instagramming the experience. He bought a bike (“turns out it’s easier to ride the thing when you’re not trying to simultaneously check your Twitter”). “The end came too soon,” Thurston lamented. But he had start-ups to run and books to market, so after the twenty-five days passed, he reluctantly reactivated his online presence.

Baratunde Thurston’s experiment neatly summarizes two important points about our culture’s current relationship with social networks like Facebook, Twitter, and Instagram, and infotainment sites like Business Insider and BuzzFeed - two categories of online distraction that I will collectively call “network tools” in the pages ahead. The first point is that we increasingly recognize that these tools fragment our time and reduce our ability to concentrate. This reality no longer generates much debate; we all feel it. This is a real problem for many different people, but the problem is especially dire if you’re attempting to improve your ability to work deeply. In the preceding rule, for example, I described several strategies to help you sharpen your focus. These efforts will become significantly more difficult if you simultaneously behave like a pre-experiment Baratunde Thurston, allowing your life outside such training to remain a distracted blur of apps and browser tabs. Willpower is limited, and therefore the more enticing tools you have pulling at your attention, the harder it’ll be to maintain focus on something important. To master the art of deep work, therefore, you must take back control of your time and attention from the many diversions that attempt to steal them.

Before we begin fighting back against these distractions, however, we must better understand the battlefield. This brings me to the second important point summarized by Baratunde Thurston’s story: the impotence with which knowledge workers currently discuss this problem of network tools and attention. Overwhelmed by these tools’ demands on his time, Thurston felt that his only option was to (temporarily) quit the Internet altogether. This idea that a drastic Internet sabbatical* is the only alternative to the distraction generated by social media and infotainment has increasingly pervaded our cultural conversation.

The problem with this binary response to this issue is that these two choices are much too crude to be useful. The notion that you would quit the Internet is, of course, an overstuffed straw man, infeasible for most (unless you’re a journalist writing a piece about distraction). No one is meant to actually follow Baratunde Thurston’s lead - and this reality provides justification for remaining with the only offered alternative: accepting our current distracted state as inevitable. For all the insight and clarity that Thurston gained during his Internet sabbatical, for example, it didn’t take him long once the experiment ended to slide back into the fragmented state where he began. On the day when I first starting writing this chapter, which fell only six months after Thurston’s article originally appeared in Fast Company, the reformed connector had already sent a dozen Tweets in the few hours since he woke up.

This rule attempts to break us out of this rut by proposing a third option: accepting that these tools are not inherently evil, and that some of them might be quite vital to your success and happiness, but at the same time also accepting that the threshold for allowing a site regular access to your time and attention (not to mention personal data) should be much more stringent, and that most people should therefore be using many fewer such tools. I won’t ask you, in other words, to quit the Internet altogether like Baratunde Thurston did for twenty-five days back in 2013. But I will ask you to reject the state of distracted hyperconnectedness that drove him to that drastic experiment in the first place. There is a middle ground, and if you’re interested in developing a deep work habit, you must fight to get there.

Our first step toward finding this middle ground in network tool selection is to understand the current default decision process deployed by most Internet users. In the fall of 2013, I received insight into this process because of an article I wrote explaining why I never joined Facebook. Though the piece was meant to be explanatory and not accusatory, it nonetheless put many readers on the defensive, leading them to reply with justifications for their use of the service. Here are some examples of these justifications:

• “Entertainment was my initial draw to Facebook. I can see what my friends are up to and post funny photos, make quick comments.”

• “[When] I first joined, [I didn’t know why]… By mere curiosity I joined a forum of short fiction stories. [Once] there I improved my writing and made very good friends.”

• “[I use] Facebook because a lot of people I knew in high school are on there.”

Here’s what strikes me about these responses (which are representative of the large amount of feedback I received on this topic): They’re surprisingly minor. I don’t doubt, for example, that the first commenter from this list finds some entertainment in using Facebook, but I would also assume that this person wasn’t suffering some severe deficit of entertainment options before he or she signed up for the service. I would further wager that this user would succeed in staving off boredom even if the service were suddenly shut down. Facebook, at best, added one more (arguably quite mediocre) entertainment option to many that already existed.

Another commenter cited making friends in a writing forum. I don’t doubt the existence of these friends, but we can assume that these friendships are lightweight - given that they’re based on sending short messages back and forth over a computer network. There’s nothing wrong with such lightweight friendships, but they’re unlikely to be at the center of this user’s social life. Something similar can be said about the commenter who reconnected with high school friends: This is a nice diversion, but hardly something central to his or her sense of social connection or happiness.

To be clear, I’m not trying to denigrate the benefits identified previously - there’s nothing illusory or misguided about them. What I’m emphasizing, however, is that these benefits are minor and somewhat random. (By contrast, if you’d instead asked someone to justify the use of, say, the World Wide Web more generally, or e-mail, the arguments would become much more concrete and compelling.) To this observation, you might reply that value is value: If you can find some extra benefit in using a service like Facebook - even if it’s small - then why not use it? I call this way of thinking the any-benefit mind-set, as it identifies any possible benefit as sufficient justification for using a network tool. In more detail:

The Any-Benefit Approach to Network Tool Selection: You’re justified in using a network tool if you can identify any possible benefit to its use, or anything you might possibly miss out on if you don’t use it.

The problem with this approach, of course, is that it ignores all the negatives that come along with the tools in question. These services are engineered to be addictive - robbing time and attention from activities that more directly support your professional and personal goals (such as deep work). Eventually, if you use these tools enough, you’ll arrive at the state of burned-out, hyperdistracted connectivity that plagued Baratunde Thurston and millions of others like him. It’s here that we encounter the true insidious nature of an any-benefit mind-set. The use of network tools can be harmful. If you don’t attempt to weigh pros against cons, but instead use any glimpse of some potential benefit as justification for unrestrained use of a tool, then you’re unwittingly crippling your ability to succeed in the world of knowledge work.

This conclusion, if considered objectively, shouldn’t be surprising. In the context of network tools, we’ve become comfortable with the any-benefit mind-set, but if we instead zoom out and consider this mind-set in the broader context of skilled labor, it suddenly seems a bizarre and ahistorical approach to choosing tools. In other words, once you put aside the revolutionary rhetoric surrounding all things Internet - the sense, summarized in Part 1, that you’re either fully committed to “the revolution” or a Luddite curmudgeon - you’ll soon realize that network tools are not exceptional; they’re tools, no different from a blacksmith’s hammer or an artist’s brush, used by skilled laborers to do their jobs better (and occasionally to enhance their leisure). Throughout history, skilled laborers have applied sophistication and skepticism to their encounters with new tools and their decisions about whether to adopt them. There’s no reason why knowledge workers cannot do the same when it comes to the Internet - the fact that the skilled labor here now involves digital bits doesn’t change this reality.

To help understand what this more careful tool curation might look like, it makes sense to start by talking to someone who makes a living working with (nondigital) tools and relies on a complex relationship with these tools to succeed. Fortunately for our purposes, I found just such an individual in a lanky English major turned successful sustainable farmer, named (almost too aptly), Forrest Pritchard.

Forrest Pritchard runs Smith Meadows, a family farm located an hour west of D.C. - one of many farms clustered in the valleys of the Blue Ridge Mountains. Soon after taking control of the land from his parents, as I learned, Pritchard moved the operation away from traditional monoculture crops and toward the then novel concept of grass-finished meat. The farm bypasses wholesaling - you cannot find Smith Meadows steaks in Whole Foods - to sell direct to consumers at the bustling farmers’ markets in the Washington, D.C., metro area. By all accounts, the farm is thriving in an industry that rarely rewards small operations.

I first encountered Pritchard at our local farmers’ market in Takoma Park, Maryland, where the Smith Meadows stand does good business. To see Pritchard, usually standing a foot taller than most of his suburbanite customers, wearing the obligatory faded flannel of the farmer, is to see a craftsman confident in his trade. I introduced myself to him because farming is a skill dependent on the careful management of tools, and I wanted to understand how a craftsman in a nondigital field approaches this crucial task.

“Haymaking is a good example,” he told me, not long into one of our conversations on the topic. “It’s a subject where I can give you the basic idea without having to gloss over the underlying economics.”

When Pritchard took over Smith Meadows, he explained, the farm made its own hay to use as animal feed during the winter months when grazing is impossible. Haymaking is done with a piece of equipment called a hay baler: a device you pull behind a tractor that compresses and binds dried grass into bales. If you raise animals on the East Coast there’s an obvious reason to own and operate a hay baler: Your animals need hay. Why spend money to “buy in” feed when you have perfectly good grass growing for free right in your own soil? If a farmer subscribed to the any-benefit approach used by knowledge workers, therefore, he would definitely buy a hay baler. But as Pritchard explained to me (after preemptively apologizing for a moment of snark), if a farmer actually adopted such a simplistic mind-set, “I’d be counting the days until the ‘For Sale’ sign goes up on the property.” Pritchard, like most practitioners of his trade, instead deploys a more sophisticated thought process when assessing tools. And after applying this process to the hay baler, Pritchard was quick to sell it: Smith Meadows now purchases all the hay it uses.

Here’s why…

“Let’s start by exploring the costs of making hay,” Pritchard said. “First, there’s the actual cost of fuel, and repairs, and the shed to keep the baler. You also have to pay taxes on it.” These directly measurable costs, however, were the easy part of his decision. It was instead the “opportunity costs” that required more attention. As he elaborated: “If I make hay all summer, I can’t be doing something else. For example, I now use that time instead to raise boilers [chickens meant for eating]. These generate positive cash flow, because I can sell them. But they also produce manure which I can then use to enhance my soil.” Then there’s the equally subtle issue of assessing the secondary value of a purchased bale of hay. As Pritchard explained: “When I’m buying in hay, I’m trading cash for animal protein, as well as manure (once it passes through the animals’ system), which means I am also getting more nutrients for my land in exchange for my money. I’m also avoiding compacting soils by driving heavy machinery over my ground all summer long.”

When making his final decision on the baler, Pritchard moved past the direct monetary costs, which were essentially a wash, and instead shifted his attention to the more nuanced issue of the long-term health of his fields. For the reasons described previously, Pritchard concluded that buying in hay results in healthier fields. And as he summarized: “Soil fertility is my baseline.” By this calculation, the baler had to go.

Notice the complexity of Pritchard’s tool decision. This complexity underscores an important reality: The notion that identifying some benefit is sufficient to invest money, time, and attention in a tool is near laughable to people in his trade. Of course a hay baler offers benefits - every tool at the farm supply store has something useful to offer. At the same time, of course it offers negatives as well. Pritchard expected this decision to be nuanced. He began with a clear baseline - in his case, that soil health is of fundamental importance to his professional success - and then built off this foundation toward a final call on whether to use a particular tool.

I propose that if you’re a knowledge worker - especially one interested in cultivating a deep work habit - you should treat your tool selection with the same level of care as other skilled workers, such as farmers. Following is my attempt to generalize this assessment strategy. I call it the craftsman approach to tool selection, a name that emphasizes that tools are ultimately aids to the larger goals of one’s craft.

The Craftsman Approach to Tool Selection: Identify the core factors that determine success and happiness in your professional and personal life. Adopt a tool only if its positive impacts on these factors substantially outweigh its negative impacts.

Notice that this craftsman approach to tool selection stands in opposition to the any-benefit approach. Whereas the any-benefit mind-set identifies any potential positive impact as justification for using a tool, the craftsman variant requires that these positive impacts affect factors at the core of what’s important to you and that they outweigh the negatives.

Even though the craftsman approach rejects the simplicity of the any-benefit approach, it doesn’t ignore the benefits that currently drive people to network tools, or make any advance proclamations about what’s “good” or “bad” technology: It simply asks that you give any particular network tool the same type of measured, nuanced accounting that tools in other trades have been subjected to throughout the history of skilled labor.

The three strategies that follow in this rule are designed to grow your comfort with abandoning the any-benefit mind-set and instead applying the more thoughtful craftsman philosophy in curating the tools that lay claim to your time and attention. This guidance is important because the craftsman approach is not cut-and-dry. Identifying what matters most in your life, and then attempting to assess the impacts of various tools on these factors, doesn’t reduce to a simple formula - this task requires practice and experimentation. The strategies that follow provide some structure for this practice and experimentation by forcing you to reconsider your network tools from many different angles. Combined, they should help you cultivate a more sophisticated relationship with your tools that will allow you to take back enough control over your time and attention to enable the rest of the ideas in Part 2 to succeed.

Apply the Law of the Vital Few to Your Internet Habits

Malcolm Gladwell doesn’t use Twitter. In a 2013 interview he explained why: “Who says my fans want to hear from me on Twitter?” He then joked: “I know a lot of people would like to see less of me.” Michael Lewis, another mega-bestselling author, also doesn’t use the service, explaining in The Wire: “I don’t tweet, I don’t Twitter, I couldn’t even tell you how to read or where to find a Twitter message.” And as mentioned in Part 1, the award-winning New Yorker scribe George Packer also avoids the service, and indeed only recently even succumbed to the necessity of owning a smartphone.

These three writers don’t think Twitter is useless. They’re quick to accept that other writers find it useful. Packer’s admission of non-Twitter use, in fact, was written as a response to an unabashedly pro-Twitter article by the late New York Times media critic David Carr, a piece in which Carr effused:

And now, nearly a year later, has Twitter turned my brain to mush? No, I’m in narrative on more things in a given moment than I ever thought possible, and instead of spending a half-hour surfing in search of illumination, I get a sense of the day’s news and how people are reacting to it in the time that it takes to wait for coffee at Starbucks.

At the same time, however, Gladwell, Lewis, and Packer don’t feel like the service offers them nearly enough advantages to offset its negatives in their particular circumstances. Lewis, for example, worries that adding more accessibility will sap his energy and reduce his ability to research and write great stories, noting: “It’s amazing how overly accessible people are. There’s a lot of communication in my life that’s not enriching, it’s impoverishing.” While Packer, for his part, worries about distraction, saying: “Twitter is crack for media addicts.” He goes so far as to describe Carr’s rave about the service as “the most frightening picture of the future that I’ve read thus far in the new decade.”

We don’t have to argue about whether these authors are right in their personal decisions to avoid Twitter (and similar tools), because their sales numbers and awards speak for themselves. We can instead use these decisions as a courageous illustration of the craftsman approach to tool selection in action. In a time when so many knowledge workers - and especially those in creative fields - are still trapped in the any-benefit mind-set, it’s refreshing to see a more mature approach to sorting through such services. But the very rareness of these examples reminds us that mature and confident assessments of this type aren’t easy to make. Recall the complexity of the thought process, highlighted earlier, that Forrest Pritchard had to slog through to make a decision on his hay baler: For many knowledge workers, and many of the tools in their lives, these decisions will be equally complex. The goal of this strategy, therefore, is to offer some structure to this thought process - a way to reduce some of the complexity of deciding which tools really matter to you.

The first step of this strategy is to identify the main high-level goals in both your professional and your personal life. If you have a family, for example, then your personal goals might involve parenting well and running an organized household. In the professional sphere, the details of these goals depend on what you do for a living. In my own work as a professor, for example, I pursue two important goals, one centered on being an effective teacher in the classroom and effective mentor to my graduate students, and another centered on being an effective researcher. While your goals will likely differ, the key is to keep the list limited to what’s most important and to keep the descriptions suitably high-level. (If your goal includes a specific target - “to reach a million dollars in sales” or “to publish a half dozen papers in a single year” - then it’s too specific for our purposes here.) When you’re done you should have a small number of goals for both the personal and professional areas of your life.

Once you’ve identified these goals, list for each the two or three most important activities that help you satisfy the goal. These activities should be specific enough to allow you to clearly picture doing them. On the other hand, they should be general enough that they’re not tied to a onetime outcome. For example, “do better research” is too general (what does it look like to be “doing better research”?), while “finish paper on broadcast lower bounds in time for upcoming conference submission” is too specific (it’s a onetime outcome). A good activity in this context would be something like: “regularly read and understand the cutting-edge results in my field.”

The next step in this strategy is to consider the network tools you currently use. For each such tool, go through the key activities you identified and ask whether the use of the tool has a substantially positive impact, a substantially negative impact, or little impact on your regular and successful participation in the activity. Now comes the important decision: Keep using this tool only if you concluded that it has substantial positive impacts and that these outweigh the negative impacts.

To help illustrate this strategy in action, let’s consider a case study. For the purposes of this example, assume that Michael Lewis, if asked, would have produced the following goal and corresponding important activities for his writing career.

Professional Goal: To craft well-written, narrative-driven stories that change the way people understand the world.

Key Activities Supporting This Goal:

• Research patiently and deeply.

• Write carefully and with purpose.

Now imagine that Lewis was using this goal to determine whether or not to use Twitter. Our strategy requires him to investigate Twitter’s impact on the key activities he listed that support his goal. There’s no convincing way to argue that Twitter would make Lewis substantially better at either of these activities. Deep research for Lewis, I assume, requires him to spend weeks and months getting to know a small number of sources (he’s a master of the long-form journalism skill of drawing out a source’s story over many sessions), and careful writing, of course, requires freedom from distraction. In both cases, Twitter at best has no real impact, and at worst could be substantially negative, depending on Lewis’s susceptibility to the service’s addictive attributes. The conclusion would therefore be that Lewis shouldn’t use Twitter.

You might argue at this point that confining our example to this single goal is artificial, as it ignores the areas where a service like Twitter has its best chance of contributing. For writers, in particular, Twitter is often presented as a tool to establish connections with your audience that ultimately lead to more sales. For a writer like Michael Lewis, however, marketing doesn’t likely merit its own goal when he assesses what’s important in his professional life. This follows because his reputation guarantees that he will receive massive coverage in massively influential media channels, if the book is really good. His focus, therefore, is much more productively applied to the goal of writing the best possible book than instead trying to squeeze out a few extra sales through inefficient author-driven means. In other words, the question is not whether Twitter has some conceivable benefit to Lewis; it’s instead whether Twitter use significantly and positively affects the most important activities in his professional life.

What about a less famous writer? In this case, book marketing might play a more primary role in his or her goals. But when forced to identify the two or three most important activities supporting this goal, it’s unlikely that the type of lightweight one-on-one contact enabled by Twitter would make the list. This is the result of simple math. Imagine that our hypothetical author diligently sends ten individualized tweets a day, five days a week - each of which connects one-on-one with a new potential reader. Now imagine that 50 percent of the people contacted in this manner become loyal fans who will definitely buy the author’s next book. Over the two-year period it might take to write this book, this yields two thousand sales - a modest boost at best in a marketplace where bestseller status requires two or three times more sales per week. The question once again is not whether Twitter offers some benefits, but instead whether it offers enough benefits to offset its drag on your time and attention (two resources that are especially valuable to a writer).

Having seen an example of this approach applied to a professional context, let’s next consider the potentially more disruptive setting of personal goals. In particular, let’s apply this approach to one of our culture’s most ubiquitous and fiercely defended tools: Facebook.

When justifying the use of Facebook (or similar social networks), most people cite its importance to their social lives. With this in mind, let’s apply our strategy to understand whether Facebook makes the cut due to its positive impact on this aspect of our personal goals. To do so, we’ll once again work with a hypothetical goal and key supporting activities.

Personal Goal: To maintain close and rewarding friendships with a group of people who are important to me.

Key Activities Supporting This Goal:

1. Regularly take the time for meaningful connection with those who are most important to me (e.g., a long talk, a meal, joint activity).

2. Give of myself to those who are most important to me (e.g., making nontrivial sacrifices that improve their lives).

Not everyone will share this exact goal or supporting activities, but hopefully you’ll stipulate that they apply to many people. Let’s now step back and apply our strategy’s filtering logic to the example of Facebook in the context of this personal goal. This service, of course, offers any number of benefits to your social life. To name a few that are often mentioned: It allows you to catch up with people you haven’t seen in a while, it allows you to maintain lightweight contact with people you know but don’t run into regularly, it allows you to more easily monitor important events in people’s lives (such as whether or not they’re married or what their new baby looks like), and it allows you to stumble onto online communities or groups that match your interests.

These are real benefits that Facebook undeniably offers, but none of these benefits provide a significant positive impact to the two key activities we listed, both of which are offline and effort intensive. Our strategy, therefore, would return a perhaps surprising but clear conclusion: Of course Facebook offers benefits to your social life, but none are important enough to what really matters to you in this area to justify giving it access to your time and attention.*

To be clear, I’m not arguing that everyone should stop using Facebook. I’m instead showing that for this specific (representative) case study, the strategy proposed here would suggest dropping this service. I can imagine, however, other plausible scenarios that would lead to the opposite conclusion. Consider, for example, a college freshman. For someone in this situation, it might be more important to establish new friendships than to support existing relationships. The activities this student identifies for supporting his goal of a thriving social life, therefore, might include something like, “attend lots of events and socialize with lots of different people.” If this is a key activity, and you’re on a college campus, then a tool like Facebook would have a substantially positive impact and should be used.

To give another example, consider someone in the military who’s deployed overseas. For this hypothetical soldier, keeping in frequent lightweight touch with friends and family left back home is a plausible priority, and one that might once again be best supported through social networks.

What should be clear from these examples is that this strategy, if applied as described, will lead many people who currently use tools like Facebook or Twitter to abandon them - but not everyone. You might, at this point, complain about the arbitrariness of allowing only a small number of activities to dominate your decisions about such tools. As we established previously, for example, Facebook has many benefits to your social life; why would one abandon it just because it doesn’t happen to help the small number of activities that we judged most important? What’s key to understand here, however, is that this radical reduction of priorities is not arbitrary, but is instead motivated by an idea that has arisen repeatedly in any number of different fields, from client profitability to social equality to prevention of crashes in computer programs.

The Law of the Vital Few*: In many settings, 80 percent of a given effect is due to just 20 percent of the possible causes.

For example, it might be the case that 80 percent of a business’s profits come from just 20 percent of its clients, 80 percent of a nation’s wealth is held by its richest 20 percent of citizens, or 80 percent of computer software crashes come from just 20 percent of the identified bugs. There’s a formal mathematical underpinning to this phenomenon (an 80/20 split is roughly what you would expect when describing a power law distribution over impact - a type of distribution that shows up often when measuring quantities in the real world), but it’s probably most useful when applied heuristically as a reminder that, in many cases, contributions to an outcome are not evenly distributed.

Moving forward, let’s assume that this law holds for the important goals in your life. As we noted, many different activities can contribute to your achieving these goals. The law of the vital few, however, reminds us that the most important 20 percent or so of these activities provide the bulk of the benefit. Assuming that you could probably list somewhere between ten and fifteen distinct and potentially beneficial activities for each of your life goals, this law says that it’s the top two or three such activities - the number that this strategy asks you to focus on - that make most of the difference in whether or not you succeed with the goal.

Even if you accept this result, however, you still might argue that you shouldn’t ignore the other 80 percent of possible beneficial activities. It’s true that these less important activities don’t contribute nearly as much to your goal as your top one or two, but they can provide some benefit, so why not keep them in the mix? As long as you don’t ignore the more important activities, it seems like it can’t hurt to also support some of the less important alternatives.

This argument, however, misses the key point that all activities, regardless of their importance, consume your same limited store of time and attention. If you service low-impact activities, therefore, you’re taking away time you could be spending on higher-impact activities. It’s a zero-sum game. And because your time returns substantially more rewards when invested in high-impact activities than when invested in low-impact activities, the more of it you shift to the latter, the lower your overall benefit.

The business world understands this math. This is why it’s not uncommon to see a company fire unproductive clients. If 80 percent of their profits come from 20 percent of their clients, then they make more money by redirecting the energy from low-revenue clients to better service the small number of lucrative contracts - each hour spent on the latter returns more revenue than each hour spent on the former. The same holds true for your professional and personal goals. By taking the time consumed by low-impact activities - like finding old friends on Facebook - and reinvesting in high-impact activities - like taking a good friend out to lunch - you end up more successful in your goal. To abandon a network tool using this logic, therefore, is not to miss out on its potential small benefits, but is instead to get more out of the activities you already know to yield large benefits.

To return to where we started, for Malcolm Gladwell, Michael Lewis, and George Packer, Twitter doesn’t support the 20 percent of activities that generate the bulk of the success in their writing careers. Even though in isolation this service might return some minor benefits, when their careers are viewed as a whole, they’re likely more successful not using Twitter, and redirecting that time to more fruitful activities, than if they added it into their schedule as one more thing to manage. You should take this same care in deciding which tools you allow to claim your own limited time and attention.

Quit Social Media

When Ryan Nicodemus decided to simplify his life, one of his first targets was his possessions. At the time, Ryan lived alone in a spacious three-bedroom condo. For years, driven by a consumerist impulse, he had been trying his best to fill this ample space. Now it was time to reclaim his life from his stuff. The strategy he deployed was simple to describe but radical in concept. He spent an afternoon packing everything he owned into cardboard boxes as if he was about to move. In order to transform what he described as a “difficult undertaking” into something less onerous, he called it a “packing party,” explaining: “Everything’s more exciting when it’s a party, right?”

Once the packing was done, Nicodemus then spent the next week going through his normal routine. If he needed something that was packed, he would unpack it and put it back where it used to go. At the end of the week, he noticed that the vast majority of his stuff remained untouched in its boxes.

So he got rid of it.

Stuff accumulates in people’s lives, in part, because when faced with a specific act of elimination it’s easy to worry, “What if I need this one day?,” and then use this worry as an excuse to keep the item in question sitting around. Nicodemus’s packing party provided him with definitive evidence that most of his stuff was not something he needed, and it therefore supported his quest to simplify.

The last strategy provided a systematic method to help you begin sorting through the network tools that currently lay claim to your time and attention. This strategy offers you a different but complementary approach to these same issues, and it’s inspired by Ryan Nicodemus’s approach to getting rid of his useless stuff.

In more detail, this strategy asks that you perform the equivalent of a packing party on the social media services that you currently use. Instead of “packing,” however, you’ll instead ban yourself from using them for thirty days. All of them: Facebook, Instagram, Google+, Twitter, Snapchat, Vine - or whatever other services have risen to popularity since I first wrote these words. Don’t formally deactivate these services, and (this is important) don’t mention online that you’ll be signing off: Just stop using them, cold turkey. If someone reaches out to you by other means and asks why your activity on a particular service has fallen off, you can explain, but don’t go out of your way to tell people.

After thirty days of this self-imposed network isolation, ask yourself the following two questions about each of the services you temporarily quit:

1. Would the last thirty days have been notably better if I had been able to use this service?

2. Did people care that I wasn’t using this service?

If your answer is “no” to both questions, quit the service permanently. If your answer was a clear “yes,” then return to using the service. If your answers are qualified or ambiguous, it’s up to you whether you return to the service, though I would encourage you to lean toward quitting. (You can always rejoin later.)

This strategy picks specifically on social media because among the different network tools that can claim your time and attention, these services, if used without limit, can be particularly devastating to your quest to work deeper. They offer personalized information arriving on an unpredictable intermittent schedule - making them massively addictive and therefore capable of severely damaging your attempts to schedule and succeed with any act of concentration. Given these dangers, you might expect that more knowledge workers would avoid these tools altogether - especially those like computer programmers or writers whose livelihood explicitly depends on the outcome of deep work. But part of what makes social media insidious is that the companies that profit from your attention have succeeded with a masterful marketing coup: convincing our culture that if you don’t use their products you might miss out.

This fear that you might miss out has obvious parallels to Nicodemus’s fear that the voluminous stuff in his closets might one day prove useful, which is why I’m suggesting a corrective strategy that parallels his packing party. By spending a month without these services, you can replace your fear that you might miss out - on events, on conversations, on shared cultural experience - with a dose of reality. For most people this reality will confirm something that seems obvious only once you’ve done the hard work of freeing yourself from the marketing messages surrounding these tools: They’re not really all that important in your life.

The reason why I ask you to not announce your thirty-day experiment is because for some people another part of the delusion that binds them to social media is the idea that people want to hear what you have to say, and that they might be disappointed if you suddenly leave them bereft of your commentary. I’m being somewhat facetious here in my wording, but this underlying sentiment is nonetheless common and important to tackle. As of this writing, for example, the average number of followers for a Twitter user is 208. When you know that more than two hundred people volunteered to hear what you have to say, it’s easy to begin to believe that your activities on these services are important. Speaking from experience as someone who makes a living trying to sell my ideas to people: This is a powerfully addictive feeling!

But here’s the reality of audiences in a social media era. Before these services existed, building an audience of any size beyond your immediate friends and family required hard, competitive work. In the early 2000s, for example, anyone could start a blog, but to gain even just a handful of unique visitors per month required that you actually put in the work to deliver information that’s valuable enough to capture someone’s attention. I know this difficulty well. My first blog was started in the fall of 2003. It was called, cleverly enough, Inspiring Moniker. I used it to muse on my life as a twenty-one-year-old college student. There were, I’m embarrassed to admit, long stretches where no one read it (a term I’m using literally). As I learned in the decade that followed, a period in which I patiently and painstakingly built an audience for my current blog, Study Hacks, from a handful of readers to hundreds of thousands per month, is that earning people’s attention online is hard, hard work.

Except now it’s not.

Part of what fueled social media’s rapid assent, I contend, is its ability to short-circuit this connection between the hard work of producing real value and the positive reward of having people pay attention to you. It has instead replaced this timeless capitalist exchange with a shallow collectivist alternative: I’ll pay attention to what you say if you pay attention to what I say - regardless of its value. A blog or magazine or television program that contained the content that typically populates a Facebook wall or Twitter feed, for example, would attract, on average, no audience. But when captured within the social conventions of these services, that same content will attract attention in the form of likes and comments. The implicit agreement motivating this behavior is that in return for receiving (for the most part, undeserved) attention from your friends and followers, you’ll return the favor by lavishing (similarly undeserved) attention on them. You “like” my status update and I’ll “like” yours. This agreement gives everyone a simulacrum of importance without requiring much effort in return.

By dropping off these services without notice you can test the reality of your status as a content producer. For most people and most services, the news might be sobering - no one outside your closest friends and family will likely even notice you’ve signed off. I recognize that I come across as curmudgeonly when talking about this issue - is there any other way to tackle it? - but it’s important to discuss because this quest for self-importance plays an important role in convincing people to continue to thoughtlessly fragment their time and attention.

For some people, of course, this thirty-day experiment will be difficult and generate lots of issues. If you’re a college student or online personality, for example, the abstention will complicate your life and will be noted. But for most, I suspect, the net result of this experiment, if not a massive overhaul in your Internet habits, will be a more grounded view of the role social media plays in your daily existence. These services aren’t necessarily, as advertised, the lifeblood of our modern connected world. They’re just products, developed by private companies, funded lavishly, marketed carefully, and designed ultimately to capture then sell your personal information and attention to advertisers. They can be fun, but in the scheme of your life and what you want to accomplish, they’re a lightweight whimsy, one unimportant distraction among many threatening to derail you from something deeper. Or maybe social media tools are at the core of your existence. You won’t know either way until you sample life without them.

Don’t Use the Internet to Entertain Yourself

Arnold Bennett was an English writer born near the turn of the twentieth century - a tumultuous time for his home country’s economy. The industrial revolution, which had been roaring for decades by this point, had wrenched enough surplus capital from the empire’s resources to generate a new class: the white-collar worker. It was now possible to have a job in which you spent a set number of hours a week in an office, and in exchange received a steady salary sufficient to support a household. Such a lifestyle is blandly familiar in our current age, but to Bennett and his contemporaries it was novel and in many ways distressing. Chief among Bennett’s concerns was that members of this new class were missing out on the opportunities it presented to live a full life.

“Take the case of a Londoner who works in an office, whose office hours are from ten to six, and who spends fifty minutes morning and night in travelling between his house door and his office door,” Bennett writes in his 1910 self-help classic, How to Live on 24 Hours a Day. This hypothetical London salaryman, he notes, has a little more than sixteen hours left in the day beyond these work-related hours. To Bennett, this is a lot of time, but most people in this situation tragically don’t realize its potential. The “great and profound mistake which my typical man makes in regard to his day,” he elaborates, is that even though he doesn’t particularly enjoy his work (seeing it as something to “get through”), “he persists in looking upon those hours from ten to six as ‘the day,’ to which the ten hours preceding them and the six hours following them are nothing but a prologue and epilogue.” This is an attitude that Bennett condemns as “utterly illogical and unhealthy.”

What’s the alternative to this state of affairs? Bennett suggests that his typical man see his sixteen free hours as a “day within a day,” explaining, “during those sixteen hours he is free; he is not a wage-earner; he is not preoccupied with monetary cares; he is just as good as a man with a private income.” Accordingly, the typical man should instead use this time as an aristocrat would: to perform rigorous self-improvement - a task that, according to Bennett, involves, primarily, reading great literature and poetry.

Bennett wrote about these issues more than a century ago. You might expect that in the intervening decades, a period in which this middle class exploded in size worldwide, our thinking about leisure time would have evolved. But it has not. If anything, with the rise of the Internet and the low-brow attention economy it supports, the average forty-hour-a-week employee - especially those in my tech-savvy Millennial generation - has seen the quality of his or her leisure time remain degraded, consisting primarily of a blur of distracted clicks on least-common-denominator digital entertainment. If Bennett were brought back to life today, he’d likely fall into despair at the lack of progress in this area of human development.

To be clear, I’m indifferent to the moral underpinnings behind Bennett’s suggestions. His vision of elevating the souls and minds of the middle class by reading poetry and great books feels somewhat antiquated and classist. But the logical foundation of his proposal, that you both should and can make deliberate use of your time outside work, remains relevant today - especially with respect to the goal of this rule, which is to reduce the impact of network tools on your ability to perform deep work.

In more detail, in the strategies discussed so far in this rule, we haven’t spent much time yet on a class of network tools that are particularly relevant to the fight for depth: entertainment-focused websites designed to capture and hold your attention for as long as possible. At the time of this writing, the most popular examples of such sites include the Huffington Post, BuzzFeed, Business Insider, and Reddit. This list will undoubtedly continue to evolve, but what this general category of sites shares is the use of carefully crafted titles and easily digestible content, often honed by algorithms to be maximally attention catching.

Once you’ve landed on one article in one of these sites, links on the side or bottom of the page beckon you to click on another, then another. Every available trick of human psychology, from listing titles as “popular” or “trending,” to the use of arresting photos, is used to keep you engaged. At this particular moment, for example, some of the most popular articles on BuzzFeed include, “17 Words That Mean Something Totally Different When Spelled Backward” and “33 Dogs Winning at Everything.”

These sites are especially harmful after the workday is over, where the freedom in your schedule enables them to become central to your leisure time. If you’re waiting in line, or waiting for the plot to pick up in a TV show, or waiting to finish eating a meal, they provide a cognitive crutch to ensure you eliminate any chance of boredom. As I argued in Rule #2, however, such behavior is dangerous, as it weakens your mind’s general ability to resist distraction, making deep work difficult later when you really want to concentrate. To make matters worse, these network tools are not something you join and therefore they’re not something you can remove from your life by quitting (rendering the previous two strategies irrelevant). They’re always available, just a quick click away.

Fortunately, Arnold Bennett identified the solution to this problem a hundred years earlier: Put more thought into your leisure time. In other words, this strategy suggests that when it comes to your relaxation, don’t default to whatever catches your attention at the moment, but instead dedicate some advance thinking to the question of how you want to spend your “day within a day.” Addictive websites of the type mentioned previously thrive in a vacuum: If you haven’t given yourself something to do in a given moment, they’ll always beckon as an appealing option. If you instead fill this free time with something of more quality, their grip on your attention will loosen.

It’s crucial, therefore, that you figure out in advance what you’re going to do with your evenings and weekends before they begin. Structured hobbies provide good fodder for these hours, as they generate specific actions with specific goals to fill your time. A set program of reading, à la Bennett, where you spend regular time each night making progress on a series of deliberately chosen books, is also a good option, as is, of course, exercise or the enjoyment of good (in-person) company.

In my own life, for example, I manage to read a surprising number of books in a typical year, given the demands on my time as a professor, writer, and father (on average, I’m typically reading three to five books at a time). This is possible because one of my favorite preplanned leisure activities after my kids’ bedtime is to read an interesting book. As a result, my smartphone and computer, and the distractions they can offer, typically remain neglected between the end of the workday and the next morning.

At this point you might worry that adding such structure to your relaxation will defeat the purpose of relaxing, which many believe requires complete freedom from plans or obligations. Won’t a structured evening leave you exhausted - not refreshed - the next day at work? Bennett, to his credit, anticipated this complaint. As he argues, such worries misunderstand what energizes the human spirit:

What? You say that full energy given to those sixteen hours will lessen the value of the business eight? Not so. On the contrary, it will assuredly increase the value of the business eight. One of the chief things which my typical man has to learn is that the mental faculties are capable of a continuous hard activity; they do not tire like an arm or a leg. All they want is change - not rest, except in sleep.

In my experience, this analysis is spot-on. If you give your mind something meaningful to do throughout all your waking hours, you’ll end the day more fulfilled, and begin the next one more relaxed, than if you instead allow your mind to bathe for hours in semiconscious and unstructured Web surfing.

To summarize, if you want to eliminate the addictive pull of entertainment sites on your time and attention, give your brain a quality alternative. Not only will this preserve your ability to resist distraction and concentrate, but you might even fulfill Arnold Bennett’s ambitious goal of experiencing, perhaps for the first time, what it means to live, and not just exist.

Rule #4 - Drain the Shallows

In the summer of 2007, the software company 37signals (now called Basecamp) launched an experiment: They shortened their workweek from five days to four. Their employees seemed to accomplish the same amount of work with one less day, so they made this change permanent: Every year, from May through October, 37signals employees work only Monday to Thursday (with the exception of customer support, which still operates the full week). As company cofounder Jason Fried quipped in a blog post about the decision: “People should enjoy the weather in the summer.”

It didn’t take long before the grumbles began in the business press. A few months after Fried announced his company’s decision to make four-day weeks permanent, journalist Tara Weiss wrote a critical piece for Forbes titled “Why a Four-Day Work Week Doesn’t Work.” She summarized her problem with this strategy as follows:

Packing 40 hours into four days isn’t necessarily an efficient way to work. Many people find that eight hours are tough enough; requiring them to stay for an extra two could cause morale and productivity to decrease.

Fried was quick to respond. In a blog post titled “Forbes Misses the Point of the 4-Day Work Week,” he begins by agreeing with Weiss’s premise that it would be stressful for employees to cram forty hours of effort into four days. But, as he clarifies, that’s not what he’s suggesting. “The point of the 4-day work week is about doing less work,” he writes. “It’s not about four 10-hour days… it’s about four normalish 8-hour days.”

This might seem confusing at first. Fried earlier claimed that his employees get just as much done in four days as in five days. Now, however, he’s claiming that his employees are working fewer hours. How can both be true? The difference, it turns out, concerns the role of shallow work. As Fried expands:

Very few people work even 8 hours a day. You’re lucky if you get a few good hours in between all the meetings, interruptions, web surfing, office politics, and personal business that permeate the typical workday.

Fewer official working hours helps squeeze the fat out of the typical workweek. Once everyone has less time to get their stuff done, they respect that time even more. People become stingy with their time and that’s a good thing. They don’t waste it on things that just don’t matter. When you have fewer hours you usually spend them more wisely.

In other words, the reduction in the 37signals workweek disproportionately eliminated shallow as compared to deep work, and because the latter was left largely untouched, the important stuff continued to get done. The shallow stuff that can seem so urgent in the moment turned out to be unexpectedly dispensable.

A natural reaction to this experiment is to wonder what would happen if 37signals had gone one step further. If eliminating hours of shallow work had little impact on the results produced, what would happen if they not only eliminated shallow work, but then replaced this newly recovered time with more deep work? Fortunately for our curiosity, the company soon put this bolder idea to the test as well.

Fried had always been interested in the policies of technology companies like Google that gave their employees 20 percent of their time to work on self-directed projects. While he liked this idea, he felt that carving one day out of an otherwise busy week was not enough to support the type of unbroken deep work that generates true breakthroughs. “I’d take 5 days in a row over 5 days spread out over 5 weeks,” he explained. “So our theory is that we’ll see better results when people have a long stretch of uninterrupted time.”

To test this theory, 37signals implemented something radical: The company gave its employees the entire month of June off to work deeply on their own projects. This month would be a period free of any shallow work obligations - no status meetings, no memos, and, blessedly, no PowerPoint. At the end of the month, the company held a “pitch day” in which employees pitched the ideas they’d been working on. Summarizing the experiment in an Inc. magazine article, Fried dubbed it a success. The pitch day produced two projects that were soon put into production: a better suite of tools for handling customer support and a data visualization system that helps the company understand how their customers use their products. These projects are predicted to bring substantial value to the company, but they almost certainly would not have been produced in the absence of the unobstructed deep work time provided to the employees. To tease out their potential required dozens of hours of unimpeded effort.

“How can we afford to put our business on hold for a month to ‘mess around’ with new ideas?” Fried asked rhetorically. “How can we afford not to?”

37signals’ experiments highlight an important reality: The shallow work that increasingly dominates the time and attention of knowledge workers is less vital than it often seems in the moment. For most businesses, if you eliminated significant amounts of this shallowness, their bottom line would likely remain unaffected. And as Jason Fried discovered, if you not only eliminate shallow work, but also replace this recovered time with more of the deep alternative, not only will the business continue to function; it can become more successful.

This rule asks you to apply these insights to your personal work life. The strategies that follow are designed to help you ruthlessly identify the shallowness in your current schedule, then cull it down to minimum levels - leaving more time for the deep efforts that ultimately matter most.

Before diving into the details of these strategies, however, we should first confront the reality that there’s a limit to this anti-shallow thinking. The value of deep work vastly outweighs the value of shallow, but this doesn’t mean that you must quixotically pursue a schedule in which all of your time is invested in depth. For one thing, a nontrivial amount of shallow work is needed to maintain most knowledge work jobs. You might be able to avoid checking your e-mail every ten minutes, but you won’t likely last long if you never respond to important messages. In this sense, we should see the goal of this rule as taming shallow work’s footprint in your schedule, not eliminating it.

Then there’s the issue of cognitive capacity. Deep work is exhausting because it pushes you toward the limit of your abilities. Performance psychologists have extensively studied how much such efforts can be sustained by an individual in a given day.* In their seminal paper on deliberate practice, Anders Ericsson and his collaborators survey these studies. They note that for someone new to such practice (citing, in particular, a child in the early stages of developing an expert-level skill), an hour a day is a reasonable limit. For those familiar with the rigors of such activities, the limit expands to something like four hours, but rarely more.

The implication is that once you’ve hit your deep work limit in a given day, you’ll experience diminishing rewards if you try to cram in more. Shallow work, therefore, doesn’t become dangerous until after you add enough to begin to crowd out your bounded deep efforts for the day. At first, this caveat might seem optimistic. The typical workday is eight hours. The most adept deep thinker cannot spend more than four of these hours in a state of true depth. It follows that you can safely spend half the day wallowing in the shallows without adverse effect. The danger missed by this analysis is how easily this amount of time can be consumed, especially once you consider the impact of meetings, appointments, calls, and other scheduled events. For many jobs, these time drains can leave you with surprisingly little time left for solo work.

My job as a professor, for example, is traditionally less plagued by such commitments, but even so, they often take large chunks out of my time, especially during the academic year. Turning to a random day in my calendar from the previous semester (I’m writing this during a quiet summer month), for example, I see I had a meeting from eleven to twelve, another from one to two thirty, and a class to teach from three to five. My eight-hour workday in this example is already reduced by four hours. Even if I squeezed all remaining shallow work (e-mails, tasks) into a single half hour, I’d still fall short of the goal of four hours of daily deep work. Put another way, even though we’re not capable of spending a full day in a state of blissful depth, this reality shouldn’t reduce the urgency of reducing shallow work, as the typical knowledge workday is more easily fragmented than many suspect.

To summarize, I’m asking you to treat shallow work with suspicion because its damage is often vastly underestimated and its importance vastly overestimated. This type of work is inevitable, but you must keep it confined to a point where it doesn’t impede your ability to take full advantage of the deeper efforts that ultimately determine your impact. The strategies that follow will help you act on this reality.

Maintain a thoughtful say in what you are doing with your time

Quantify the Depth of Every Activity

An advantage of scheduling your day is that you can determine how much time you’re actually spending in shallow activities. Extracting this insight from your schedules, however, can become tricky in practice, as it’s not always clear exactly how shallow you should consider a given task. To expand on this challenge, let’s start by reminding ourselves of the formal definition of shallow work that I introduced in the introduction:

Shallow Work: Noncognitively demanding, logistical-style tasks, often performed while distracted. These efforts tend not to create much new value in the world and are easy to replicate.

Some activities clearly satisfy this definition. Checking e-mail, for example, or scheduling a conference call, is unquestionably shallow in nature. But the classification of other activities can be more ambiguous. Consider the following tasks:

• Example #1: Editing a draft of an academic article that you and a collaborator will soon submit to a journal.

• Example #2: Building a PowerPoint presentation about this quarter’s sales figures.

• Example #3: Attending a meeting to discuss the current status of an important project and to agree on the next steps.

It’s not obvious at first how to categorize these examples. The first two describe tasks that can be quite demanding, and the final example seems important to advance a key work objective. The purpose of this strategy is to give you an accurate metric for resolving such ambiguity - providing you with a way to make clear and consistent decisions about where given work tasks fall on the shallow-to-deep scale. To do so, it asks that you evaluate activities by asking a simple (but surprisingly illuminating) question:

How long would it take (in months) to train a smart recent college graduate with no specialized training in my field to complete this task?

To illustrate this approach, let’s apply this question to our examples of ambiguous tasks.

• Analyzing Example #1: To properly edit an academic paper requires that you understand the nuances of the work (so you can make sure it’s being described precisely) and the nuances of the broader literature (so you can make sure it’s being cited properly). These requirements require cutting-edge knowledge of an academic field - a task that in the age of specialization takes years of diligent study at the graduate level and beyond. When it comes to this example, the answer to our question would therefore be quite large, perhaps on the scale of fifty to seventy-five months.

• Analyzing Example #2: The second example doesn’t fare so well by this analysis. To create a PowerPoint presentation that describes your quarterly sales requires three things: first, knowledge of how to make a PowerPoint presentation; second, an understanding of the standard format of these quarterly performance presentations within your organization; and third, an understanding of what sales metrics your organization tracks and how to convert them into the right graphs. The hypothetical college graduate imagined by our question, we can assume, would already know how to use PowerPoint, and learning the standard format for your organization’s presentations shouldn’t require more than a week. The real question, therefore, is how long it takes a bright college graduate to understand the metrics you track, where to find the results, and how to clean those up and translate them into graphs and charts that are appropriate for a slide presentation. This isn’t a trivial task, but for a bright college grad it wouldn’t require more than an additional month or so of training - so we can use two months as our conservative answer.

• Analyzing Example #3: Meetings can be tricky to analyze. They can seem tedious at times but they’re often also presented as playing a key role in your organization’s most important activities. The method presented here helps cut through this veneer. How long would it take to train a bright recent college graduate to take your place in a planning meeting? He or she would have to understand the project well enough to know its milestones and the skills of its participants. Our hypothetical grad might also need some insight into the interpersonal dynamics and the reality of how such projects are executed at the organization. At this point, you might wonder if this college grad would also need a deep expertise in the topic tackled by the project. For a planning meeting - probably not. Such meetings rarely dive into substantive content and tend to feature a lot of small talk and posturing in which participants try to make it seem like they’re committing to a lot without actually having to commit. Give a bright recent graduate three months to learn the ropes and he or she could take your place without issue in such a gabfest. So we’ll use three months as our answer.

This question is meant as a thought experiment (I’m not going to ask you to actually hire a recent college graduate to take over tasks that score low). But the answers it provides will help you objectively quantify the shallowness or depth of various activities. If our hypothetical college graduate requires many months of training to replicate a task, then this indicates that the task leverages hard-won expertise. As argued earlier, tasks that leverage your expertise tend to be deep tasks and they can therefore provide a double benefit: They return more value per time spent, and they stretch your abilities, leading to improvement. On the other hand, a task that our hypothetical college graduate can pick up quickly is one that does not leverage expertise, and therefore it can be understood as shallow.

What should you do with this strategy? Once you know where your activities fall on the deep-to-shallow scale, bias your time toward the former. When we reconsider our case studies, for example, we see that the first task is something that you would want to prioritize as a good use of time, while the second and third are activities of a type that should be minimized - they might feel productive, but their return on (time) investment is measly.

Of course, how one biases away from shallow and toward depth is not always obvious - even after you know how to accurately label your commitments. This brings us to the strategies that follow, which will provide specific guidance on how to accomplish this tricky goal.

Ask Your Boss for a Shallow Work Budget

Here’s an important question that’s rarely asked: What percentage of my time should be spent on shallow work? This strategy suggests that you ask it. If you have a boss, in other words, have a conversation about this question. (You’ll probably have to first define for him or her what “shallow” and “deep” work means.) If you work for yourself, ask yourself this question. In both cases, settle on a specific answer. Then - and this is the important part - try to stick to this budget. (The strategies that precede and follow this one will help you achieve this goal.)

For most people in most non-entry-level knowledge work jobs, the answer to the question will be somewhere in the 30 to 50 percent range (there’s a psychological distaste surrounding the idea of spending the majority of your time on unskilled tasks, so 50 percent is a natural upper limit, while at the same time most bosses will begin to worry that if this percentage gets too much lower than 30 percent you’ll be reduced to a knowledge work hermit who thinks big thoughts but never responds to e-mails).

Obeying this budget will likely require changes to your behavior. You’ll almost certainly end up forced into saying no to projects that seem infused with shallowness while also more aggressively reducing the amount of shallowness in your existing projects. This budget might lead you to drop the need for a weekly status meeting in preference for results-driven reporting (“let me know when you’ve made significant progress; then we’ll talk”). It might also lead you to start spending more mornings in communication isolation or decide it’s not as important as you once thought to respond quickly and in detail to every cc’d e-mail that crosses your inbox.

These changes are all positive for your quest to make deep work central to your working life. On the one hand, they don’t ask you to abandon your core shallow obligations - a move that would cause problems and resentment - as you’re still spending a lot of time on such efforts. On the other hand, they do force you to place a hard limit on the amount of less urgent obligations you allow to slip insidiously into your schedule. This limit frees up space for significant amounts of deep effort on a consistent basis.

The reason why these decisions should start with a conversation with your boss is that this agreement establishes implicit support from your workplace. If you work for someone else, this strategy provides cover when you turn down an obligation or restructure a project to minimize shallowness. You can justify the move because it’s necessary for you to hit your prescribed target mix of work types. As I discussed in Chapter 2, part of the reason shallow work persists in large quantities in knowledge work is that we rarely see the total impact of such efforts on our schedules. We instead tend to evaluate these behaviors one by one in the moment - a perspective from which each task can seem quite reasonable and convenient. The tools from earlier in this rule, however, allow you to make this impact explicit. You can now confidently say to your boss, “This is the exact percentage of my time spent last week on shallow work,” and force him or her to give explicit approval for that ratio. Faced with these numbers, and the economic reality they clarify (it’s incredibly wasteful, for example, to pay a highly trained professional to send e-mail messages and attend meetings for thirty hours a week), a boss will be led to the natural conclusion that you need to say no to some things and to streamline others - even if this makes life less convenient for the boss, or for you, or for your coworkers. Because, of course, in the end, a business’s goal is to generate value, not to make sure its employees’ lives are as easy as possible.

If you work for yourself, this exercise will force you to confront the reality of how little time in your “busy” schedule you’re actually producing value. These hard numbers will provide you the confidence needed to start scaling back on the shallow activities that are sapping your time. Without these numbers, it’s difficult for an entrepreneur to say no to any opportunity that might generate some positive return. “I have to be on Twitter!,” “I have to maintain an active Facebook presence!,” “I have to tweak the widgets on my blog!,” you tell yourself, because when considered in isolation, to say no to any one of these activities seems like you’re being lazy. By instead picking and sticking with a shallow-to-deep ratio, you can replace this guilt-driven unconditional acceptance with the more healthy habit of trying to get the most out of the time you put aside for shallow work (therefore still exposing yourself to many opportunities), but keeping these efforts constrained to a small enough fraction of your time and attention to enable the deep work that ultimately drives your business forward.

Of course, there’s always the possibility that when you ask this question the answer is stark. No boss will explicitly answer, “One hundred percent of your time should be shallow!” (unless you’re entry level, at which point you need to delay this exercise until you’ve built enough skills to add deep efforts to your official work responsibilities), but a boss might reply, in so many words, “as much shallow work as is needed for you to promptly do whatever we need from you at the moment.” In this case, the answer is still useful, as it tells you that this isn’t a job that supports deep work, and a job that doesn’t support deep work is not a job that can help you succeed in our current information economy. You should, in this case, thank the boss for the feedback, and then promptly start planning how you can transition into a new position that values depth.

Finish Your Work by Five Thirty

In the seven days preceding my first writing these words, I participated in sixty-five different e-mail conversations. Among these sixty-five conversations, I sent exactly five e-mails after five thirty p.m. The immediate story told by these statistics is that, with few exceptions, I don’t send e-mails after five thirty. But given how intertwined e-mail has become with work in general, there’s a more surprising reality hinted by this behavior: I don’t work after five thirty p.m.

I call this commitment fixed-schedule productivity, as I fix the firm goal of not working past a certain time, then work backward to find productivity strategies that allow me to satisfy this declaration. I’ve practiced fixed-schedule productivity happily for more than half a decade now, and it’s been crucial to my efforts to build a productive professional life centered on deep work. In the pages ahead, I will try to convince you to adopt this strategy as well.

Let me start my pitch for fixed-schedule productivity by first noting that, according to conventional wisdom, in the academic world I inhabit this tactic should fail. Professors - especially junior professors - are notorious for adopting grueling schedules that extend into the night and through weekends. Consider, for example, a blog post published by a young computer science professor whom I’ll call “Tom.” In this post, which Tom wrote in the winter of 2014, he replicates his schedule for a recent day in which he spent twelve hours at his office. This schedule includes five different meetings and three hours of “administrative” tasks, which he describes as “tending to bushels of e-mails, filling out bureaucratic forms, organizing meeting notes, planning future meetings.” By his estimation, he spent only one and a half out of the twelve total hours sitting in his office tackling “real” work, which he defines as efforts that make progress toward a “research deliverable.” It’s no wonder that Tom feels coerced into working well beyond the standard workday. “I’ve already accepted the reality that I’ll be working on weekends,” he concludes in another post. “Very few junior faculty can avoid such a fate.”

And yet, I have. Even though I don’t work at night and rarely work on weekends, between arriving at Georgetown in the fall of 2011 and beginning work on this chapter in the fall of 2014, I’ve published somewhere around twenty peer-reviewed articles. I also won two competitive grants, published one (nonacademic) book, and have almost finished writing another (which you’re reading at the moment). All while avoiding the grueling schedules deemed necessary by the Toms of the world.

What explains this paradox? We can find a compelling answer in a widely disseminated article published in 2013 by an academic further along in her career, and far more accomplished than I: Radhika Nagpal, the Fred Kavli Professor of Computer Science at Harvard University. Nagpal opens the article by claiming that much of the stress suffered by tenure-track professors is self-imposed. “Scary myths and scary data abound about life as a tenure-track faculty at an ‘R1’ [research-focused] university,” she begins, before continuing to explain how she finally decided to disregard the conventional wisdom and instead “deliberately… do specific things to preserve my happiness.” This deliberate effort led Nagpal to enjoy her pre-tenure time “tremendously.”

Nagpal goes on to detail several examples of these efforts, but there’s one tactic in particular that should sound familiar. As Nagpal admits, early in her academic career she found herself trying to cram work into every free hour between seven a.m. and midnight (because she has kids, this time, especially in the evening, was often severely fractured). It didn’t take long before she decided this strategy was unsustainable, so she set a limit of fifty hours a week and worked backward to determine what rules and habits were needed to satisfy this constraint. Nagpal, in other words, deployed fixed-schedule productivity.

We know this strategy didn’t hurt her academic career, as she ended up earning tenure on schedule and then jumping to the full professor level after only three additional years (an impressive ascent). How did she pull this off? According to her article, one of the main techniques for respecting her hour limit was to set drastic quotas on the major sources of shallow endeavors in her academic life. For example, she decided she would travel only five times per year for any purpose, as trips can generate a surprisingly large load of urgent shallow obligations (from making lodging arrangements to writing talks). Five trips a year may still sound like a lot, but for an academic it’s light. To emphasize this point, note that Matt Welsh, a former colleague of Nagpal in the Harvard computer science department (he now works for Google) once wrote a blog post in which he claimed it was typical for junior faculty to travel twelve to twenty-four times a year. (Imagine the shallow efforts Nagpal avoided in sidestepping an extra ten to fifteen trips!) The travel quota is just one of several tactics that Nagpal used to control her workday (she also, for example, placed limits on the number of papers she would review per year), but what all her tactics shared was a commitment to ruthlessly capping the shallow while protecting the deep efforts - that is, original research - that ultimately determined her professional fate.

Returning to my own example, it’s a similar commitment that enables me to succeed with fixed scheduling. I, too, am incredibly cautious about my use of the most dangerous word in one’s productivity vocabulary: “yes.” It takes a lot to convince me to agree to something that yields shallow work. If you ask for my involvement in university business that’s not absolutely necessary, I might respond with a defense I learned from the department chair who hired me: “Talk to me after tenure.” Another tactic that works well for me is to be clear in my refusal but ambiguous in my explanation for the refusal. The key is to avoid providing enough specificity about the excuse that the requester has the opportunity to defuse it. If, for example, I turn down a time-consuming speaking invitation with the excuse that I have other trips scheduled for around the same time, I don’t provide details - which might leave the requester the ability to suggest a way to fit his or her event into my existing obligations - but instead just say, “Sounds interesting, but I can’t make it due to schedule conflicts.” In turning down obligations, I also resist the urge to offer a consolation prize that ends up devouring almost as much of my schedule (e.g., “Sorry I can’t join your committee, but I’m happy to take a look at some of your proposals as they come together and offer my thoughts”). A clean break is best.

In addition to carefully guarding my obligations, I’m incredibly conscientious about managing my time. Because my time is limited each day, I cannot afford to allow a large deadline to creep up on me, or a morning to be wasted on something trivial, because I didn’t take a moment to craft a smart plan. The Damoclean cap on the workday enforced by fixed-schedule productivity has a way of keeping my organization efforts sharp. Without this looming cutoff, I’d likely end up more lax in my habits.

To summarize these observations, Nagpal and I can both succeed in academia without Tom-style overload due to two reasons. First, we’re asymmetric in the culling forced by our fixed-schedule commitment. By ruthlessly reducing the shallow while preserving the deep, this strategy frees up our time without diminishing the amount of new value we generate. Indeed, I would go so far as to argue that the reduction in shallow frees up more energy for the deep alternative, allowing us to produce more than if we had defaulted to a more typical crowded schedule. Second, the limits to our time necessitate more careful thinking about our organizational habits, also leading to more value produced as compared to longer but less organized schedules.

The key claim of this strategy is that these same benefits hold for most knowledge work fields. That is, even if you’re not a professor, fixed-schedule productivity can yield powerful benefits. In most knowledge work jobs, it can be difficult in the moment to turn down a shallow commitment that seems harmless in isolation - be it accepting an invitation to get coffee or agreeing to “jump on a call.” A commitment to fixed-schedule productivity, however, shifts you into a scarcity mind-set. Suddenly any obligation beyond your deepest efforts is suspect and seen as potentially disruptive. Your default answer becomes no, the bar for gaining access to your time and attention rises precipitously, and you begin to organize the efforts that pass these obstacles with a ruthless efficiency. It might also lead you to test assumptions about your company’s work culture that you thought were ironclad but turn out to be malleable. It’s common, for example, to receive e-mails from your boss after hours. Fixed-schedule productivity would have you ignore these messages until the next morning. Many suspect that this would cause problems, as such responses are expected, but in many cases, the fact that your boss happens to be clearing her inbox at night doesn’t mean that she expects an immediate response - a lesson this strategy would soon help you discover.

Fixed-schedule productivity, in other words, is a meta-habit that’s simple to adopt but broad in its impact. If you have to choose just one behavior that reorients your focus toward the deep, this one should be high on your list of possibilities. If you’re still not sure, however, about the idea that artificial limits on your workday can make you more successful, I urge you to once again turn your attention to the career of fixed-schedule advocate Radhika Nagpal. In a satisfying coincidence, at almost the exact same time that Tom was lamenting online about his unavoidably intense workload as a young professor, Nagpal was celebrating the latest of the many professional triumphs she has experienced despite her fixed schedule: Her research was featured on the cover of the journal Science.

Become Hard to Reach

No discussion of shallow work is complete without considering e-mail. This quintessential shallow activity is particularly insidious in its grip on most knowledge workers’ attention, as it delivers a steady stream of distractions addressed specifically to you. Ubiquitous e-mail access has become so ingrained in our professional habits that we’re beginning to lose the sense that we have any say in its role in our life. As John Freeman warns in his 2009 book, The Tyranny of E-mail, with the rise of this technology “we are slowly eroding our ability to explain - in a careful, complex way - why it is so wrong for us to complain, resist, or redesign our workdays so that they are manageable.” E-mail seems a fait accompli. Resistance is futile.

This strategy pushes back at this fatalism. Just because you cannot avoid this tool altogether doesn’t mean you have to cede all authority over its role in your mental landscape. In the following sections I describe three tips that will help you regain authority over how this technology accesses your time and attention, and arrest the erosion of autonomy identified by Freeman. Resistance is not futile: You have more control over your electronic communication than you might at first assume.

Tip #1: Make People Who Send You E-mail Do More Work

Most nonfiction authors are easy to reach. They include an e-mail address on their author websites along with an open invitation to send them any request or suggestion that comes to mind. Many even encourage this feedback as a necessary commitment to the elusive but much-touted importance of “community building” among their readers. But here’s the thing: I don’t buy it.

If you visit the contact page on my author website, there’s no general-purpose e-mail address. Instead, I list different individuals you can contact for specific purposes: my literary agent for rights requests, for example, or my speaking agent for speaking requests. If you want to reach me, I offer only a special-purpose e-mail address that comes with conditions and a lowered expectation that I’ll respond:

If you have an offer, opportunity, or introduction that might make my life more interesting, e-mail me at interesting [at] calnewport.com. For the reasons stated above, I’ll only respond to those proposals that are a good match for my schedule and interests.

I call this approach a sender filter, as I’m asking my correspondents to filter themselves before attempting to contact me. This filter has significantly reduced the time I spend in my inbox. Before I began using a sender filter, I had a standard general-purpose e-mail address listed on my website. Not surprisingly, I used to receive a large volume of long e-mails asking for advice on specific (and often quite complicated) student or career questions. I like to help individuals, but these requests became overwhelming - they didn’t take the senders long to craft but they would require a lot of explanation and writing on my part to respond. My sender filter has eliminated most such communication, and in doing so, has drastically reduced the number of messages I encounter in my writing inbox. As for my own interest in helping my readers, I now redirect this energy toward settings I carefully choose to maximize impact. Instead of allowing any student in the world to send me a question, for example, I now work closely with a small number of student groups where I’m quite accessible and can offer more substantial and effective mentoring.

Another benefit of a sender filter is that it resets expectations. The most crucial line in my description is the following: “I’ll only respond to those proposals that are a good match for my schedule and interests.” This seems minor, but it makes a substantial difference in how my correspondents think about their messages to me. The default social convention surrounding e-mail is that unless you’re famous, if someone sends you something, you owe him or her a response. For most, therefore, an inbox full of messages generates a major sense of obligation.

By instead resetting your correspondents’ expectations to the reality that you’ll probably not respond, the experience is transformed. The inbox is now a collection of opportunities that you can glance at when you have the free time - seeking out those that make sense for you to engage. But the pile of unread messages no longer generates a sense of obligation. You could, if you wanted to, ignore them all, and nothing bad would happen. Psychologically, this can be freeing.

I worried when I first began using a sender filter that it would seem pretentious - as if my time was more valuable than that of my readers - and that it would upset people. But this fear wasn’t realized. Most people easily accept the idea that you have a right to control your own incoming communication, as they would like to enjoy this same right. More important, people appreciate clarity. Most are okay to not receive a response if they don’t expect one (in general, those with a minor public presence, such as authors, overestimate how much people really care about their replies to their messages).

In some cases, this expectation reset might even earn you more credit when you do respond. For example, an editor of an online publication once sent me a guest post opportunity with the assumption, set by my filter, that I would likely not respond. When I did, it proved a happy surprise. Here’s her summary of the interaction:

So, when I emailed Cal to ask if he wanted to contribute to [the publication], my expectations were set. He didn’t have anything on his [sender filter] about wanting to guest blog, so there wouldn’t have been any hard feelings if I’d never heard a peep. Then, when he did respond, I was thrilled.

My particular sender filter is just one example of this general strategy. Consider consultant Clay Herbert, who is an expert in running crowd-funding campaigns for technology start-ups: a specialty that attracts a lot of correspondents hoping to glean some helpful advice. As a Forbes.com article on sender filters reports, “At some point, the number of people reaching out exceeded [Herbert’s] capacity, so he created filters that put the onus on the person asking for help.”

Though he started from a similar motivation as me, Herbert’s filters ended up taking a different form. To contact him, you must first consult an FAQ to make sure your question has not already been answered (which was the case for a lot of the messages Herbert was processing before his filters were in place). If you make it through this FAQ sieve, he then asks you to fill out a survey that allows him to further screen for connections that seem particularly relevant to his expertise. For those who make it past this step, Herbert enforces a small fee you must pay before communicating with him. This fee is not about making extra money, but is instead about selecting for individuals who are serious about receiving and acting on advice. Herbert’s filters still enable him to help people and encounter interesting opportunities. But at the same time, they have reduced his incoming communication to a level he can easily handle.

To give another example, consider Antonio Centeno, who runs the popular Real Man Style blog. Centeno’s sender filter lays out a two-step process. If you have a question, he diverts you to a public location to post it. Centeno thinks it’s wasteful to answer the same questions again and again in private one-on-one conversations. If you make it past this step, he then makes you commit to, by clicking check boxes, the following three promises:

I am not asking Antonio a style question I could find searching Google for 10 minutes.

I am not SPAMMING Antonio with a cut-and-pasting generic request to promote my unrelated business.

I will do a good deed for some random stranger if Antonio responds within 23 hours.

The message box in which you can type your message doesn’t appear on the contact page until after you’ve clicked the box by all three promises.

To summarize, the technologies underlying e-mail are transformative, but the current social conventions guiding how we apply this technology are underdeveloped. The notion that all messages, regardless of purpose or sender, arrive in the same undifferentiated inbox, and that there’s an expectation that every message deserves a (timely) response, is absurdly unproductive. The sender filter is a small but useful step toward a better state of affairs, and is an idea whose time has come - at least for the increasing number of entrepreneurs and freelancers who both receive a lot of incoming communication and have the ability to dictate their accessibility. (I’d also love to see similar rules become ubiquitous for intra-office communication in large organizations, but for the reasons argued in Chapter 2, we’re probably a long way from that reality.) If you’re in a position to do so, consider sender filters as a way of reclaiming some control over your time and attention.

Tip #2: Do More Work When You Send or Reply to E-mails

Consider the following standard e-mails:

E-mail #1: “It was great to meet you last week. I’d love to follow up on some of those issues we discussed. Do you want to grab coffee?”

E-mail #2: “We should get back to the research problem we discussed during my last visit. Remind me where we are with that?”

E-mail #3: “I took a stab at that article we discussed. It’s attached. Thoughts?”

These three examples should be familiar to most knowledge workers, as they’re representative of many of the messages that fill their inboxes. They’re also potential productivity land mines: How you respond to them will have a significant impact on how much time and attention the resulting conversation ultimately consumes.

In particular, interrogative e-mails like these generate an initial instinct to dash off the quickest possible response that will clear the message - temporarily - out of your inbox. A quick response will, in the short term, provide you with some minor relief because you’re bouncing the responsibility implied by the message off your court and back onto the sender’s. This relief, however, is short-lived, as this responsibility will continue to bounce back again and again, continually sapping your time and attention. I suggest, therefore, that the right strategy when faced with a question of this type is to pause a moment before replying and take the time to answer the following key prompt:

What is the project represented by this message, and what is the most efficient (in terms of messages generated) process for bringing this project to a successful conclusion?

Once you’ve answered this question for yourself, replace a quick response with one that takes the time to describe the process you identified, points out the current step, and emphasizes the step that comes next. I call this the process-centric approach to e-mail, and it’s designed to minimize both the number of e-mails you receive and the amount of mental clutter they generate.

To better explain this process and why it works consider the following process-centric responses to the sample e-mails from earlier:

Process-Centric Response to E-mail #1: “I’d love to grab coffee. Let’s meet at the Starbucks on campus. Below I listed two days next week when I’m free. For each day, I listed three times. If any of those day and time combinations work for you, let me know. I’ll consider your reply confirmation for the meeting. If none of those date and time combinations work, give me a call at the number below and we’ll hash out a time that works. Looking forward to it.”

Process-Centric Response to E-mail #2: “I agree that we should return to this problem. Here’s what I suggest…

“Sometime in the next week e-mail me everything you remember about our discussion on the problem. Once I receive that message, I’ll start a shared directory for the project and add to it a document that summarizes what you sent me, combined with my own memory of our past discussion. In the document, I’ll highlight the two or three most promising next steps.

“We can then take a crack at those next steps for a few weeks and check back in. I suggest we schedule a phone call for a month from now for this purpose. Below I listed some dates and times when I’m available for a call. When you respond with your notes, indicate the date and time combination that works best for you and we’ll consider that reply confirmation for the call. I look forward to digging into this problem.”

Process-Centric Response to E-mail #3: “Thanks for getting back to me. I’m going to read this draft of the article and send you back an edited version annotated with comments on Friday (the 10th). In this version I send back, I’ll edit what I can do myself, and add comments to draw your attention to places where I think you’re better suited to make the improvement. At that point, you should have what you need to polish and submit the final draft, so I’ll leave you to do that - no need to reply to this message or to follow up with me after I return the edits - unless, of course, there’s an issue.”

In crafting these sample responses, I started by identifying the project implied by the message. Notice, the word “project” is used loosely here. It can cover things that are large and obviously projects, such as making progress on a research problem (Example #2), but it applies just as easily to small logistical challenges like setting up a coffee meeting (Example #1). I then took a minute or two to think through a process that gets us from the current state to a desired outcome with a minimum of messages required. The final step was to write a reply that clearly describes this process and where we stand. These examples centered on an e-mail reply, but it should be clear that a similar approach also works when writing an e-mail message from scratch.

The process-centric approach to e-mail can significantly mitigate the impact of this technology on your time and attention. There are two reasons for this effect. First, it reduces the number of e-mails in your inbox - sometimes significantly (something as simple as scheduling a coffee meeting can easily spiral into half a dozen or more messages over a period of many days, if you’re not careful about your replies). This, in turn, reduces the time you spend in your inbox and reduces the brainpower you must expend when you do.

Second, to steal terminology from David Allen, a good process-centric message immediately “closes the loop” with respect to the project at hand. When a project is initiated by an e-mail that you send or receive, it squats in your mental landscape - becoming something that’s “on your plate” in the sense that it has been brought to your attention and eventually needs to be addressed. This method closes this open loop as soon as it forms. By working through the whole process, adding to your task lists and calendar any relevant commitments on your part, and bringing the other party up to speed, your mind can reclaim the mental real estate the project once demanded. Less mental clutter means more mental resources available for deep thinking.

Process-centric e-mails might not seem natural at first. For one thing, they require that you spend more time thinking about your messages before you compose them. In the moment, this might seem like you’re spending more time on e-mail. But the important point to remember is that the extra two to three minutes you spend at this point will save you many more minutes reading and responding to unnecessary extra messages later.

The other issue is that process-centric messages can seem stilted and overly technical. The current social conventions surrounding e-mail promote a conversational tone that clashes with the more systematic schedules or decision trees commonly used in process-centric communication. If this concerns you, I suggest that you add a longer conversational preamble to your messages. You can even separate the process-centric portion of the message from the conversational opening with a divider line, or label it “Proposed Next Steps,” so that its technical tone seems more appropriate in context.

In the end, these minor hassles are worth it. By putting more thought up front into what’s really being proposed by the e-mail messages that flit in and out of your inbox, you’ll greatly reduce the negative impact of this technology on your ability to do work that actually matters.

Tip #3: Don’t Respond

As a graduate student at MIT, I had the opportunity to interact with famous academics. In doing so, I noticed that many shared a fascinating and somewhat rare approach to e-mail: Their default behavior when receiving an e-mail message is to not respond.

Over time, I learned the philosophy driving this behavior: When it comes to e-mail, they believed, it’s the sender’s responsibility to convince the receiver that a reply is worthwhile. If you didn’t make a convincing case and sufficiently minimize the effort required by the professor to respond, you didn’t get a response.

For example, the following e-mail would likely not generate a reply with many of the famous names at the Institute:

Hi professor. I’d love to stop by sometime to talk about <topic X>. Are you available?

Responding to this message requires too much work (“Are you available?” is too vague to be answered quickly). Also, there’s no attempt to argue that this chat is worth the professor’s time. With these critiques in mind, here’s a version of the same message that would be more likely to generate a reply:

Hi professor. I’m working on a project similar to <topic X> with my advisor, <professor Y>. Is it okay if I stop by in the last fifteen minutes of your office hours on Thursday to explain what we’re up to in more detail and see if it might complement your current project?

Unlike the first message, this one makes a clear case for why this meeting makes sense and minimizes the effort needed from the receiver to respond.

This tip asks that you replicate, to the extent feasible in your professional context, this professorial ambivalence to e-mail. To help you in this effort, try applying the following three rules to sort through which messages require a response and which do not.

Professorial E-mail Sorting: Do not reply to an e-mail message if any of the following applies:

• It’s ambiguous or otherwise makes it hard for you to generate a reasonable response.

• It’s not a question or proposal that interests you.

• Nothing really good would happen if you did respond and nothing really bad would happen if you didn’t.

In all cases, there are many obvious exceptions. If an ambiguous message about a project you don’t care about comes from your company’s CEO, for example, you’ll respond. But looking beyond these exceptions, this professorial approach asks you to become way more ruthless when deciding whether or not to click “reply.”

This tip can be uncomfortable at first because it will cause you to break a key convention currently surrounding e-mail: Replies are assumed, regardless of the relevance or appropriateness of the message. There’s also no way to avoid that some bad things will happen if you take this approach. At the minimum, some people might get confused or upset - especially if they’ve never seen standard e-mail conventions questioned or ignored. Here’s the thing: This is okay. As the author Tim Ferriss once wrote: “Develop the habit of letting small bad things happen. If you don’t, you’ll never find time for the life-changing big things.” It should comfort you to realize that, as the professors at MIT discovered, people are quick to adjust their expectations to the specifics of your communication habits. The fact you didn’t respond to their hastily scribed messages is probably not a central event in their lives.

Once you get past the discomfort of this approach, you’ll begin to experience its rewards. There are two common tropes bandied around when people discuss solutions to e-mail overload. One says that sending e-mails generates more e-mails, while the other says that wrestling with ambiguous or irrelevant e-mails is a major source of inbox-related stress. The approach suggested here responds aggressively to both issues - you send fewer e-mails and ignore those that aren’t easy to process - and by doing so will significantly weaken the grip your inbox maintains over your time and attention.

Conclusion

The story of Microsoft’s founding has been told so many times that it’s entered the realm of legend. In the winter of 1974, a young Harvard student named Bill Gates sees the Altair, the world’s first personal computer, on the cover of Popular Electronics. Gates realizes that there’s an opportunity to design software for the machine, so he drops everything and with the help of Paul Allen and Monte Davidoff spends the next eight weeks hacking together a version of the BASIC programming language for the Altair. This story is often cited as an example of Gates’s insight and boldness, but recent interviews have revealed another trait that played a crucial role in the tale’s happy ending: Gates’s preternatural deep work ability.

As Walter Isaacson explained in a 2013 article on the topic for the Harvard Gazette, Gates worked with such intensity for such lengths during this two-month stretch that he would often collapse into sleep on his keyboard in the middle of writing a line of code. He would then sleep for an hour or two, wake up, and pick up right where he left off - an ability that a still-impressed Paul Allen describes as “a prodigious feat of concentration.” In his book The Innovators, Isaacson later summarized Gates’s unique tendency toward depth as follows: “The one trait that differentiated [Gates from Allen] was focus. Allen’s mind would flit between many ideas and passions, but Gates was a serial obsessor.”

It’s here, in this story of Gates’s obsessive focus, that we encounter the strongest form of my argument for deep work. It’s easy, amid the turbulence of a rapidly evolving information age, to default to dialectical grumbling. The curmudgeons among us are vaguely uneasy about the attention people pay to their phones, and pine for the days of unhurried concentration, while the digital hipsters equate such nostalgia with Luddism and boredom, and believe that increased connection is the foundation for a utopian future. Marshall McLuhan declared that “the medium is the message,” but our current conversation on these topics seems to imply that “the medium is morality” - either you’re on board with the Facebook future or see it as our downfall.

As I emphasized in this book’s introduction, I have no interest in this debate. A commitment to deep work is not a moral stance and it’s not a philosophical statement - it is instead a pragmatic recognition that the ability to concentrate is a skill that gets valuable things done. Deep work is important, in other words, not because distraction is evil, but because it enabled Bill Gates to start a billion-dollar industry in less than a semester.

This is also a lesson, as it turns out, that I’ve personally relearned again and again in my own career. I’ve been a depth devotee for more than a decade, but even I am still regularly surprised by its power. When I was in graduate school, the period when I first encountered and started prioritizing this skill, I found that deep work allowed me to write a pair of quality peer-reviewed papers each year (a respectable rate for a student), while rarely having to work past five on weekdays or work at all on weekends (a rarity among my peers).

As I neared my transition to professorship, however, I began to worry. As a student and a postdoc my time commitments were minimal - leaving me most of my day to shape as I desired. I knew I would lose this luxury in the next phase of my career, and I wasn’t confident in my ability to integrate enough deep work into this more demanding schedule to maintain my productivity. Instead of just stewing in my anxiety, I decided to do something about it: I created a plan to bolster my deep work muscles.

These training efforts were deployed during my last two years at MIT, while I was a postdoc starting to look for professor positions. My main tactic was to introduce artificial constraints on my schedule, so as to better approximate the more limited free time I expected as a professor. In addition to my rule about not working at night, I started to take extended lunch breaks in the middle of the day to go for a run and then eat lunch back at my apartment. I also signed a deal to write my fourth book, So Good They Can’t Ignore You, during this period - a project, of course, that soon levied its own intense demands on my time.

To compensate for these new constraints, I refined my ability to work deeply. Among other methods, I began to more carefully block out deep work hours and preserve them against incursion. I also developed an ability to carefully work through thoughts during the many hours I spent on foot each week (a boon to my productivity), and became obsessive about finding disconnected locations conducive to focus. During the summer, for example, I would often work under the dome in Barker Engineering library - a pleasingly cavernous location that becomes too crowded when class is in session, and during the winter, I sought more obscure locations for some silence, eventually developing a preference for the small but well-appointed Lewis Music Library. At some point, I even bought a $50 high-end grid-lined lab notebook to work on mathematical proofs, believing that its expense would induce more care in my thinking.

I ended up surprised by how well this recommitment to depth ended up working. After I’d taken a job as a computer science professor at Georgetown University in the fall of 2011, my obligations did in fact drastically increase. But I had been training for this moment. Not only did I preserve my research productivity; it actually improved. My previous rate of two good papers a year, which I maintained as an unencumbered graduate student, leapt to four good papers a year, on average, once I became a much more encumbered professor.

Impressive as this was to me, however, I was soon to learn that I had not yet reached the limits of what deep work could produce. This lesson would come during my third year as a professor. During my third year at Georgetown, which spanned the fall of 2013 through the summer of 2014, I turned my attention back to my deep work habits, searching for more opportunities to improve. A big reason for this recommitment to depth is the book you’re currently reading - most of which was written during this period. Writing a seventy-thousand-word book manuscript, of course, placed a sudden new constraint on my already busy schedule, and I wanted to make sure my academic productivity didn’t take a corresponding hit. Another reason I turned back to depth was the looming tenure process. I had a year or two of publications left before my tenure case was submitted. This was the time, in other words, to make a statement about my abilities (especially given that my wife and I were planning on growing our family with a second child in the final year before tenure). The final reason I turned back to depth was more personal and (admittedly) a touch petulant. I had applied and been rejected for a well-respected grant that many of my colleagues were receiving. I was upset and embarrassed, so I decided that instead of just complaining or wallowing in self-doubt, I would compensate for losing the grant by increasing the rate and impressiveness of my publications - allowing them to declare on my behalf that I actually did know what I was doing, even if this one particular grant application didn’t go my way.

I was already an adept deep worker, but these three forces drove me to push this habit to an extreme. I became ruthless in turning down time-consuming commitments and began to work more in isolated locations outside my office. I placed a tally of my deep work hours in a prominent position near my desk and got upset when it failed to grow at a fast enough rate. Perhaps most impactful, I returned to my MIT habit of working on problems in my head whenever a good time presented itself - be it walking the dog or commuting. Whereas earlier, I tended to increase my deep work only as a deadline approached, this year I was relentless - most every day of most every week I was pushing my mind to grapple with results of consequence, regardless of whether or not a specific deadline was near. I solved proofs on subway rides and while shoveling snow. When my son napped on the weekend, I would pace the yard thinking, and when stuck in traffic I would methodically work through problems that were stymieing me.

As this year progressed, I became a deep work machine - and the result of this transformation caught me off guard. During the same year that I wrote a book and my oldest son entered the terrible twos, I managed to more than double my average academic productivity, publishing nine peer-reviewed papers - all the while maintaining my prohibition on work in the evenings.

I’m the first to admit that my year of extreme depth was perhaps a bit too extreme: It proved cognitively exhausting, and going forward I’ll likely moderate this intensity. But this experience reinforces the point that opened this conclusion: Deep work is way more powerful than most people understand. It’s a commitment to this skill that allowed Bill Gates to make the most of an unexpected opportunity to create a new industry, and that allowed me to double my academic productivity the same year I decided to concurrently write a book. To leave the distracted masses to join the focused few, I’m arguing, is a transformative experience.

The deep life, of course, is not for everybody. It requires hard work and drastic changes to your habits. For many, there’s a comfort in the artificial busyness of rapid e-mail messaging and social media posturing, while the deep life demands that you leave much of that behind. There’s also an uneasiness that surrounds any effort to produce the best things you’re capable of producing, as this forces you to confront the possibility that your best is not (yet) that good. It’s safer to comment on our culture than to step into the Rooseveltian ring and attempt to wrestle it into something better.

But if you’re willing to sidestep these comforts and fears, and instead struggle to deploy your mind to its fullest capacity to create things that matter, then you’ll discover, as others have before you, that depth generates a life rich with productivity and meaning. In Part 1, I quoted writer Winifred Gallagher saying, “I’ll live the focused life, because it’s the best kind there is.” I agree. So does Bill Gates. And hopefully now that you’ve finished this book, you agree too.

Also by Cal Newport

So Good They Can’t Ignore You

How to Be a High School Superstar

How to Become a Straight-A Student

How to Win at College

Notes

Introduction

“In my retiring room”; “I keep the key”; and “The feeling of repose and renewal”: Jung, Carl. Memories, Dreams, Reflections. Trans. Richard Winston. New York: Pantheon, 1963.

“Although he had many patients” and other information on artists’ habits: Currey, Mason. Daily Rituals: How Artists Work. New York: Knopf, 2013.

The following timeline of Jung’s life and work also proved useful in untangling the role of deep work in his career: Cowgill, Charles. “Carl Jung.” May 1997. http://www.muskingum.edu/~psych/psycweb/history/jung.htm.

Anders Ericsson from Florida State University is a leading academic researcher on the concept of deliberate practice. He has a nice description of the idea on his academic website: http://www.psy.fsu.edu/faculty/ericsson/ericsson.exp.perf.html.

My list of the deep work habits of important personalities draws from the following sources:

• Montaigne information comes from: Bakewell, Sarah. How to Live: Or A Life of Montaigne in One Question and Twenty Attempts at an Answer. New York: Other Press, 2010.

• Mark Twain information comes from: Mason Currey’s Daily Rituals.

• Woody Allen information comes from Robert Weide’s 2011 documentary, Woody Allen: A Documentary.

• Peter Higgs information comes from: Sample, Ian. “Peter Higgs Proves as Elusive as Higgs Boson after Nobel Success.” Guardian, October 9, 2013, http://www.theguardian.com/science/2013/oct/08/nobel-laureate-peter-higgs-boson-elusive.

• J.K. Rowling information comes from: https://twitter.com/jk_rowling.

• Bill Gates information comes from: Guth, Robert. “In Secret Hideaway, Bill Gates Ponders Microsoft’s Future.” Wall Street Journal, March 28, 2005, http://online.wsj.com/news/articles/SB111196625830690477.

• Neal Stephenson information comes from an older version of Stephenson’s website, which has been preserved in a December 2003 snapshot by The Internet Archive: http://web.archive.org/web/20031207060405/http://www.well.com/~neal/badcorrespondent.html.

“A 2012 McKinsey study found that”: Chui, Michael, et al. “The Social Economy: Unlocking Value and Productivity Through Social Technologies.” McKinsey Global Institute. July 2012. http://www.mckinsey.com/insights/high_tech_telecoms_internet/the_social_economy.

“What the Net seems to be doing is” and “I’m not the only one”: Carr, Nicholas. “Is Google Making Us Stupid?” The Atlantic Monthly, July–August 2008. http://www.theatlantic.com/magazine/archive/2008/07/is-google-making-us-stupid/306868/.

The fact that Carr had to move to a cabin to finish writing The Shallows comes from the Author’s Note in the paperback version of the book.

“superpower of the 21st century”: Barker, Eric. “Stay Focused: 5 Ways to Increase Your Attention Span.” Barking Up the Wrong Tree. September 18, 2013. http://www.bakadesuyo.com/2013/09/stay-focused/.

Chapter 1

Information about Nate Silver’s election traffic on the New York Times website: Tracy, Marc. “Nate Silver Is a One-Man Traffic Machine for the Times.” New Republic, November 6, 2012. http://www.newrepublic.com/article/109714/nate-silvers-fivethirtyeight-blog-drawing-massive-traffic-new-york-times.

Information about Nate Silver’s ESPN/ABC News deal: Allen, Mike. “How ESPN and ABC Landed Nate Silver.” Politico, July 22, 2013. http://www.politico.com/blogs/media/2013/07/how-espn-and-abc-landed-nate-silver-168888.html.

Examples of concerns regarding Silver’s methodology:

Davis, Sean M. “Is Nate Silver’s Value at Risk?” Daily Caller, November 1, 2012. http://dailycaller.com/2012/11/01/is-nate-silvers-value-at-risk/.

Marcus, Gary, and Ernest Davis. “What Nate Silver Gets Wrong.” The New Yorker, January 25, 2013. http://www.newyorker.com/online/blogs/books/2013/01/what-nate-silver-gets-wrong.html.

Information about David Heinemeier Hansson comes from the following websites:

• David Heinemeier Hanson. http://david.heinemeierhansson.com/.

• Lindberg, Oliver. “The Secrets Behind 37signals’ Success.” TechRadar, September 6, 2010. http://www.techradar.com/us/news/internet/the-secrets-behind-37signals-success-712499.

• “OAK Racing.” Wikipedia. http://en.wikipedia.org/wiki/OAK_Racing.

For more on John Doerr’s deals: “John Doerr.” Forbes. http://www.forbes.com/profile/john-doerr/.

The $3.3 billion net worth of John Doerr was retrieved from the following Forbes.com profile page on April 10, 2014: http://www.forbes.com/profile/john-doerr/.

“We are in the early throes of a Great Restructuring” and “Our technologies are racing ahead”: from page 9 of Brynjolfsson, Erik, and Andrew McAfee. Race Against the Machine: How the Digital Revolution Is Accelerating Innovation, Driving Productivity, and Irreversibly Transforming Employment and the Economy. Cambridge, MA: Digital Frontier Press, 2011.

“other technologies like data visualization, analytics, high speed communications”: Ibid., 9.

“The key question will be: are you good at working with intelligent machines or not?”: from page 1 of Cowen, Tyler. Average Is Over. New York: Penguin, 2013.

Rosen, Sherwin. “The Economics of Superstars.” The American Economic Review 71.5 (December 1981): 845–858.

“Hearing a succession of mediocre singers does not add up to a single outstanding performance”: Ibid., 846.

The Instagram example and its significance for labor disparities were first brought to my attention by the writing/speaking of Jaron Lanier.

How to Become a Winner in the New Economy

Details on Nate Silver’s tools:

• Hickey, Walter. “How to Become Nate Silver in 9 Simple Steps.” Business Insider, November 14, 2012. http://www.businessinsider.com/how-nate-silver-and-fivethityeight-works-2012-11.

• Silver, Nate. “IAmA Blogger for FiveThirtyEight at The New York Times. Ask Me Anything.” Reddit. http://www.reddit.com/r/IAmA/comments/166yeo/iama_blogger_for_fivethirtyeight_at_the_new_york.

• “Why Use Stata.” www.stata.com/why-use-stata/.

The SQL example I gave was from postgreSQL, an open source database system popular in both industry and (especially) academia. I don’t know what specific system Silver uses, but it almost certainly requires some variant of the SQL language used in this example.

Deep Work Helps You Quickly Learn Hard Things

“Let your mind become a lens”: from page 95 of Sertillanges, Antonin-Dalmace. The Intellectual Life: Its Spirits, Conditions, Methods. Trans. Mary Ryan. Cork, Ireland: Mercier Press, 1948.

“the development and deepening of the mind”: Ibid., 13.

Details about deliberate practice draw heavily on the following seminal survey paper on the topic: Ericsson, K.A., R.T. Krampe, and C. Tesch-Römer. “The Role of Deliberate Practice in the Acquisition of Expert Performance.” Psychological Review 100.3 (1993): 363–406.

“We deny that these differences [between expert performers and normal adults] are immutable”: Ibid., 13.

“Men of genius themselves”: from page 95 of Sertillanges, The Intellectual Life.

“Diffused attention is almost antithetical to the focused attention required by deliberate practice”: from page 368 of Ericsson, Krampe, and Tesch-Romer. “The Role of Deliberate Practice in the Acquisition of Expert Performance.”

Details on the neurobiology of expert performance can be found in: Coyle, The Talent Code.

Coyle also has a nice slideshow about myelination at his website: “Want to Be a Superstar Athlete? Build More Myelin.” The Talent Code. www.thetalentcode.com/myelin.

For more on deliberate practice, the following two books provide a good popular overview:

• Colvin, Geoffrey. Talent Is Overrated: What Really Separates World-Class Performers from Everybody Else. New York: Portfolio, 2008.

• Coyle, Daniel. The Talent Code: Greatness Isn’t Born. It’s Grown. Here’s How. New York: Bantam, 2009.

Deep Work Helps You Produce at an Elite Level

More about Adam Grant, his records, and his (thirty-page) CV can be found at his academic website: https://mgmt.wharton.upenn.edu/profile/1323/.

Grant, Adam. Give and Take: Why Helping Others Drives Our Success. New York: Viking Adult, 2013.

The article on Adam Grant in the New York Times Magazine: Dominus, Susan. “The Saintly Way to Succeed.” New York Times Magazine, March 31, 2013: MM20.

Newport, Cal. How to Become a Straight-A Student: The Unconventional Strategies Used by Real College Students to Score High While Studying Less. New York: Three Rivers Press, 2006.

Leroy, Sophie. “Why Is It So Hard to Do My Work? The Challenge of Attention Residue When Switching Between Work Tasks.” Organizational Behavior and Human Decision Processes 109 (2009): 168–181.

What About Jack Dorsey?

“He is a disrupter on a massive scale and a repeat offender” and “I do a lot of my work at stand-up tables” and details on Jack Dorsey’s daily schedule come from the following Forbes.com article: Savitz, Eric. “Jack Dorsey: Leadership Secrets of Twitter and Square.” Forbes, October 17, 2012. http://www.forbes.com/sites/ericsavitz/2012/10/17/jack-dorsey-the-leadership-secrets-of-twitter-and-square/3/.

The cited Jack Dorsey net worth number was accessed on the following Forbes.com profile on April 10, 2014: http://www.forbes.com/profile/jack-dorsey/.

“I can go a good solid Saturday without”: from an interview with Kerry Trainor that was conducted in October 2013 by HuffPost Live. A clip with the e-mail usage quote is available here: http://www.kirotv.com/videos/technology/how-long-can-vimeo-ceo-kerry-trainor-go-without/vCCBLd/.

Chapter 2

“the largest open floor plan in the world” and other information about Facebook’s new headquarters: Hoare, Rose. “Do Open Plan Offices Lead to Better Work or Closed Minds?” CNN, October 4, 2012. http://edition.cnn.com/2012/10/04/business/global-office-open-plan/.

“We encourage people to stay out in the open” and other information about Square’s headquarters:

Savitz, Eric. “Jack Dorsey: Leadership Secrets of Twitter and Square.” Forbes, October 17, 2012. http://www.forbes.com/sites/ericsavitz/2012/10/17/jack-dorsey-the-leadership-secrets-of-twitter-and-square.

“province of chatty teenagers” and “new productivity gains” from the following New York Times article about instant messaging: Strom, David. “I.M. Generation Is Changing the Way Business Talks.” New York Times, April 5, 2006. http://www.nytimes.com/2006/04/05/technology/techspecial4/05message.html.

More on Hall can be found at Hall.com and in this article: Tsotsis, Alexia. “Hall.com Raises $580K from Founder’s Collective and Others to Transform Realtime Collaboration.” TechCrunch, October 16, 2011. http://techcrunch.com/2011/10/16/hall-com-raises-580k-from-founders-collective-and-others-to-transform-realtime-collaboration/.

An up-to-date list of the more than eight hundred New York Times employees using Twitter: https://twitter.com/nytimes/nyt-journalists/members.

The original Jonathan Franzen piece for the Guardian was published online on September 13, 2013, with the title “Jonathan Franzen: What’s Wrong with the Modern World.” The piece has since been removed for “legal” issues.

Here is the October 4, 2013, Slate piece, by Katy Waldman, that ended up titled “Jonathan Franzen’s Lonely War on the Internet Continues.” Notice from the URL that the original title was even harsher: http://www.slate.com/blogs/future_tense/2013/10/04/jonathan_franzen_says_twitter_is_a_coercive_development_is_grumpy_and_out.html.

“Franzen’s a category of one”: from Jennifer Weiner’s response to Franzen in The New Republic: Weiner, Jennifer. “What Jonathan Franzen Misunderstands About Me.” New Republic, September 18, 2013, http://www.newrepublic.com/article/114762/jennifer-weiner-responds-jonathan-franzen.

“massive distraction” and “If you are just getting into some work”: Treasure, Julian. “Sound News: More Damaging Evidence on Open Plan Offices.” Sound Agency, November 16, 2011. http://www.thesoundagency.com/2011/sound-news/more-damaging-evidence-on-open-plan-offices/.

“This was reported by subjects” and related results from: Mark, Gloria, Victor M. Gonzalez, and Justin Harris. “No Task Left Behind? Examining the Nature of Fragmented Work.” Proceedings of the SIGCHI Conference on Human Factors in Computing Systems. New York: ACM, 2005.

“Twitter is crack for media addicts” and other details of George Packer’s thoughts about social media: Packer, George. “Stop the World.” The New Yorker, January 29, 2010, http://www.newyorker.com/online/blogs/georgepacker/2010/01/stop-the-world.html.

The Metric Black Hole

“A ‘free and frictionless’ method of communication” and other details of Tom Cochran’s e-mail experiment: Cochran, Tom. “Email Is Not Free.” Harvard Business Review, April 8, 2013. http://blogs.hbr.org/2013/04/email-is-not-free/.

“it is objectively difficult to measure individual”: from page 509 of Piketty, Thomas. Capital in the Twenty-First Century. Cambridge, MA: Belknap Press, 2014.

“undoubtedly true”: Manzi, Jim. “Piketty’s Can Opener.” National Review, July 7, 2014. http://www.nationalreview.com/corner/382084/pikettys-can-opener-jim-manzi. This careful and critical review of Piketty’s book by Jim Manzi is where I originally came across the Piketty citation.

The Principle of Least Resistance

“At first, the team resisted”; “putting their careers in jeopardy”; and “a better product delivered to the client” as well as a good summary of Leslie Perlow’s connectivity research can be found in Perlow, Leslie A., and Jessica L. Porter. “Making Time Off Predictable - and Required.” Harvard Business Review, October 2009. https://hbr.org/2009/10/making-time-off-predictable-and-required.

For more on David Allen’s task management system, see his book: Allen, David. Getting Things Done. New York: Viking, 2001.

Allen’s fifteen-element task management flowchart can be found in Allen, Getting Things Done, as well as online: http://gettingthingsdone.com/pdfs/tt_workflow_chart.pdf.

Busyness as a Proxy for Productivity

The h-index for an academic is (roughly speaking) the largest value x that satisfies the following rule: “I have published at least x papers with x or more citations.” Notice, this value manages to capture both how many papers you have written and how often you are cited. You cannot gain a high h-index value simply by pumping out a lot of low-value papers, or by having a small number of papers that are cited often. This metric tends to grow over careers, which is why in many fields h-index goals are tied to certain career milestones.

“To do real good physics work”: comes around the 28:20 mark in a 1981 TV interview with Richard Feynman for the BBC Horizon program (the interview aired in the United States as an episode of NOVA). The YouTube video of this interview that I watched when researching this book has since been removed due to a copyright complaint by the BBC (https://www.youtube.com/watch?v=Bgaw9qe7DEE). Transcripts of the relevant quote, however, can be found at http://articles.latimes.com/1988-02-16/news/mn-42968_1_nobel-prize/2 and http://calnewport.com/blog/2014/04/20/richard-feynman-didnt-win-a-nobel-by-responding-promptly-to-e-mails/ and http://www.worldcat.org/wcpa/servlet/DCARead?standardNo=0738201081&standardNoType=1&excerpt=true.

“Managers themselves inhabit a bewildering psychic landscape”: from page 9 of Crawford, Matthew. Shop Class as Soulcraft. New York: Penguin, 2009.

“cranking widgets”: This concept is a popular metaphor in discussing David Allen’s task management system; c.f. Mann, Merlin. “Podcast: Interview with GTD’s David Allen on Procrastination.” 43 Folders, August 19, 2007. http://www.43folders.com/2006/10/10/productive-talk-procrastination ; Schuller, Wayne. “The Power of Cranking Widgets.” Wayne Schuller’s Blog, April 9, 2008. http://schuller.id.au/2008/04/09/the-power-of-cranking-widgets-gtd-times/; and Babauta, Leo. “Cranking Widgets: Turn Your Work into Stress-free Productivity.” Zen Habits, March 6, 2007. http://zenhabits.net/cranking-widgets-turn-your-work-into/.

More on Marissa Mayer’s working-from-home prohibition: Carlson, Nicholas. “How Marissa Mayer Figured Out Work-At-Home Yahoos Were Slacking Off.” Business Insider, March 2, 2013. http://www.businessinsider.com/how-marissa-mayer-figured-out-work-at-home-yahoos-were-slacking-off-2013-3.

The Cult of the Internet

Alissa Rubin tweets at @Alissanyt. I don’t have specific evidence that Alissa Rubin was pressured to tweet. But I can make a circumstantial case: She includes “nyt” in her Twitter handle, and the Times maintains a social media desk that helps educate its employees about how to use social media (c.f. https://www.mediabistro.com/alltwitter/new-york-times-social-media-desk_b53783 ), a focus that has led to more than eight hundred employees tweeting: https://twitter.com/nytimes/nyt-journalists/members.

Here is an example of one of Alissa Rubin’s articles that I encountered when writing this chapter: Rubin, Alissa J., and Maïa de la Baume, “Claims of French Complicity in Rwanda’s Genocide Rekindle Mutual Resentment.” New York Times, April 8, 2014. http://www.nytimes.com/2014/04/09/world/africa/claims-of-french-complicity-in-rwandas-genocide-rekindle-mutual-resentment.html?ref=alissajohannsenrubin.

Postman, Neil. Technopoly: The Surrender of Culture to Technology. New York: Vintage Books, 1993.

“It does not make them illegal”: Ibid., 48.

“It’s this propensity to view ‘the Internet’ as a source of wisdom”: from page 25 of Morozov, Evgeny. To Save Everything, Click Here. New York: Public Affairs, 2013.

Chapter 3

“I do all my work by hand”: from Ric Furrer’s artist statement, which can be found online, along with general biographical details on Furrer and information about his business: http://www.doorcountyforgeworks.com.

“This part, the initial breakdown”; “You have to be very gentle”; “It’s ready”; and “To do it right, it is the most complicated thing”: from the PBS documentary “Secrets of the Viking Swords,” which is an episode of NOVA that first aired on September 25, 2013. For more information on the episode and online streaming see: http://www.pbs.org/wgbh/nova/ancient/secrets-viking-sword.html.

“The satisfactions of manifesting oneself concretely”: from page 15 of Crawford, Shop Class as Soulcraft.

“The world of information superhighways”: from Ric Furrer’s artist statement: http://www.doorcountyforgeworks.com.

A Neurological Argument for Depth

“not just cancer”; “This disease wanted to”; and “movies, walks”: from page 3 of Gallagher, Winifred. Rapt: Attention and the Focused Life. New York, Penguin, 2009.

“Like fingers pointing to the moon”: Ibid., 2.

“Who you are”: Ibid., 1.

“reset button”: Ibid., 48.

“Rather than continuing to focus”: Ibid., 49.

Though Rapt provides a good summary of Barbara Fredrickson’s research on positivity (see pages 48–49), more details can be found in Fredrickson’s 2009 book on the topic: Frederickson, Barbara. Positivity: Groundbreaking Research Reveals How to Embrace the Hidden Strength of Positive Emotions, Overcome Negativity, and Thrive. New York: Crown Archetype, 2009.

The Laura Carstensen research was featured in Rapt (see pages 50–51). For more information, see the following article: Carstensen, Laura L., and Joseph A. Mikels. “At the Intersection of Emotion and Cognition: Aging and the Positivity Effect.” Current Directions in Psychological Science 14.3 (2005): 117–121.

“concentration so intense”: from page 71 of Csikszentmihalyi, Mihaly. Flow: The Psychology of Optimal Experience. New York: Harper & Row Publishers, 1990.

“Five years of reporting”: from page 13 of Gallagher, Rapt.

“I’ll choose my targets with care”: Ibid., 14.

A Psychological Argument for Depth

For more on the experience sampling method, read the original article here:

Larson, Reed, and Mihaly Csikszentmihalyi. “The Experience Sampling Method.” New Directions for Methodology of Social & Behavioral Science. 15 (1983): 41-56.

You can also find a short summary of the technique at Wikipedia: http://en.wikipedia.org/wiki/Experience_sampling_method.

“The best moments usually occur”: from page 3 of Csikszentmihalyi, Flow.

“Ironically, jobs are actually easier to enjoy”: Ibid., 162.

“jobs should be redesigned”: Ibid., 157.

A Philosophical Argument for Depth

“The world used to be”: from page xi of Dreyfus, Hubert, and Sean Dorrance Kelly. All Things Shining: Reading the Western Classics to Find Meaning in a Secular Age. New York: Free Press, 2011.

“The Enlightenment’s metaphysical embrace”: Ibid., 204.

“Because each piece of wood is distinct”: Ibid., 210.

“is not to generate meaning”: Ibid., 209.

“Beautiful code is short and concise”: from a THNKR interview with Santiago Gonzalez available online: https://www.youtube.com/watch?v=DBXZWB_dNsw.

“We who cut mere stones” and “Within the overall structure”: from the preface of Hunt, Andrew, and David Thomas. The Pragmatic Programmer: From Journeyman to Master. New York: Addison-Wesley Professional, 1999.

Homo Sapiens Deepensis

“I’ll live the focused life”: from page 14 of Gallagher, Rapt.

Rule #1

Hofmann, W., R. Baumeister, G. Förster, and K. Vohs. “Everyday Temptations: An Experience Sampling Study of Desire, Conflict, and Self-Control.” Journal of Personality and Social Psychology 102.6 (2012): 1318–1335.

“Desire turned out to be the norm, not the exception”: from page 3 of Baumeister, Roy F., and John Tierney. Willpower: Rediscovering the Greatest Human Strength. New York: Penguin Press, 2011.

“taking a break from [hard] work”: Ibid., 4.

Original study: Baumeister, R., E. Bratlavsky, M. Muraven, and D. M. Tice. “Ego Depletion: Is the Active Self a Limited Resource?” Journal of Personality and Social Psychology 74 (1998): 1252–1265.

Decide on Your Depth Philosophy

“What I do takes long hours of studying” and “I have been a happy man”: from Donald Knuth’s Web page: http://www-cs-faculty.stanford.edu/~uno/email.html.

“Persons who wish to interfere with my concentration”: from Neal Stephenson’s old website, in a page titled “My Ongoing Battle with Continuous Partial Attention,” archived in December 2003: http://web.archive.org/web/20031231203738/http://www.well.com/~neal/.

“The productivity equation is a non-linear one”: from Neal Stephenson’s old website, in a page titled “Why I Am a Bad Correspondent,” archived in December 2003: http://web.archive.org/web/20031207060405/http://www.well.com/~neal/badcorrespondent.html.

Stephenson, Neal. Anathem. New York: William Morrow, 2008.

For more on the connection between Anathem and the tension between focus and distraction, see “Interview with Neal Stephenson,” published on GoodReads.com in September 2008: http://www.goodreads.com/interviews/show/14.Neal_Stephenson.

“I saw my chance”: from the (Internet) famous “Don’t Break the Chain” article by Brad Isaac, writing for Lifehacker.com: http://lifehacker.com/281626/jerry-seinfelds-productivity-secret.

“one of the best magazine journalists”: Hitchens, Christopher, “Touch of Evil.” London Review of Books, October 22, 1992. http://www.lrb.co.uk/v14/n20/christopher-hitchens/touch-of-evil.

Isaacson, Walter, and Evan Thomas. The Wise Men: Six Friends and the World They Made. New York: Simon and Schuster Reissue Edition, 2012. (The original version of this book was published in 1986, but it was recently republished in hardcover due presumably to Isaacson’s recent publishing success.)

“richly textured account” and “fashioned a Cold War Plutarch”: from the excerpts of reviews of Walter Isaacson’s The Wise Men that I found in the book jacket blurbs reproduced on Simon and Schuster’s official website for the book: http://books.simonandschuster.com/The-Wise-Men/Walter-Isaacson/9781476728827.

Ritualize

“every inch of [Caro’s] New York office” and “I trained myself” and other details about Robert Caro’s habits: Darman, Jonathan. “The Marathon Man,” Newsweek, February 16, 2009, which I discovered through the following post, “Robert Caro,” on Mason Currey’s Daily Routines blog: http://dailyroutines.typepad.com/daily_routines/2009/02/robert-caro.html.

The Charles Darwin information was brought to my attention by the “Charles Darwin” post on Mason Currey’s Daily Routines, December 11, 2008. http://dailyroutines.typepad.com/daily_routines/2008/12/charles-darwin.html.

This post, in turn, draws on Charles Darwin: A Companion by R.B. Freeman, accessed by Currey on The Complete Work of Charles Darwin Online.

“There is a popular notion that artists”: from the following Slate.com article: Currey, Mason. “Daily Rituals.” Slate, May 16, 2013. http://www.slate.com/articles/arts/culturebox/features/2013/daily_rituals/john_updike_william_faulkner_chuck_close_they_didn_t_wait_for_inspiration.html.

“[Great creative minds] think like artists”: from Brooks, David. “The Good Order.” New York Times, September 25, 2014, op-ed. http://www.nytimes.com/2014/09/26/opinion/david-brooks-routine-creativity-and-president-obamas-un-speech.html?_r=1.

“It is only ideas gained from walking that have any worth”: This Nietzsche quote was brought to my attention by the excellent book on walking and philosophy: Gros, Frédérick. A Philosophy of Walking. Trans. John Howe. New York: Verso Books, 2014.

Make Grand Gestures

“As I was finishing Deathly Hallows there came a day”: from the transcript of Rowling’s 2010 interview with Oprah Winfrey on Harry Potter’s Page: http://www.harrypotterspage.com/2010/10/03/transcript-of-oprah-interview-with-j-k-rowling/.

Details regarding J.K. Rowling working at the Balmoral Hotel: Johnson, Simon. “Harry Potter Fans Pay £1,000 a Night to Stay in Hotel Room Where JK Rowling Finished Series.” Telegraph, July 20, 2008. http://www.telegraph.co.uk/news/celebritynews/2437835/Harry-Potter-fans-pay-1000-a-night-to-stay-in-hotel-room-where-JK-Rowling-finished-series.html.

For more on Bill Gates’s Think Weeks: Guth, Robert A. “In Secret Hideaway, Bill Gates Ponders Microsoft’s Future.” Wall Street Journal, March 28, 2005. http://online.wsj.com/news/articles/SB111196625830690477?mg=reno64-wsj.

“It’s really about two and a half months”: from the following author interview: Birnbaum, Robert. “Alan Lightman.” Identity Theory, November 16, 2000. http://www.identitytheory.com/alan-lightman/.

Michael Pollan’s book about building a writing cabin: Pollan, Michael. A Place of My Own: The Education of an Amateur Builder. New York: Random House, 1997.

For more on William Shockley’s scramble to invent the junction transistor: “Shockley Invents the Junction Transistor.” PBS. http://www.pbs.org/transistor/background1/events/junctinv.html.

“‘Ohh! Shiny!’ DNA”: from a blog post by Shankman: “Where’s Your Home?” Peter Shankman’s website, July 2, 2014, http://shankman.com/where-s-your-home/.

“The trip cost $4,000”: from an interview with Shankman: Machan, Dyan. “Why Some Entrepreneurs Call ADHD a Superpower.” MarketWatch, July 12, 2011. http://www.marketwatch.com/story/entrepreneurs-superpower-for-some-its-adhd-1310052627559.

Don’t Work Alone

The July 2013 Bloomberg Businessweek article by Venessa Wong titled “Ending the Tyranny of the Open-Plan Office”: http://www.bloomberg.com/articles/2013-07-01/ending-the-tyranny-of-the-open-plan-office. This article has more background on the damage of open office spaces on worker productivity.

The twenty-eight hundred workers cited in regard to Facebook’s open office size was taken from the following March 2014 Daily Mail article: Prigg, Mark. “Now That’s an Open Plan Office.” http://www.dailymail.co.uk/sciencetech/article-2584738/Now-THATS-open-plan-office-New-pictures-reveal-Facebooks-hacker-campus-house-10-000-workers-ONE-room.html.

“facilitate communication and idea flow”: Konnikova, Maria. “The Open-Office Trap.” The New Yorker, January 7, 2014. http://www.newyorker.com/business/currency/the-open-office-trap.

“Open plan is pretty spectacular”: Stevenson, Seth. “The Boss with No Office.” Slate, May 4, 2014. http://www.slate.com/articles/business/psychology_of_management/2014/05/open_plan_offices_the_new_trend_in_workplace_design.1.html.

“We encourage people to stay out in the open”: Savitz, Eric. “Jack Dorsey: Leadership Secrets of Twitter and Square.” Forbes, October 17, 2012. http://www.forbes.com/sites/ericsavitz/2012/10/17/jack-dorsey-the-leadership-secrets-of-twitter-and-square/3/.

The New Yorker quotes about Building 20, as well as general background and lists of inventions, come from the following 2012 New Yorker article, combined to a lesser degree with the author’s firsthand experience with such lore while at MIT: Lehrer, Jonah. “Groupthink.” The New Yorker, January 30, 2012. http://www.newyorker.com/magazine/2012/01/30/groupthink.

“Traveling the hall’s length” and the information on Mervin Kelly and his goals for Bell Labs’s Murray Hill campus: Gertner, Jon. “True Innovation.” New York Times, February 25, 2012. http://www.nytimes.com/2012/02/26/opinion/sunday/innovation-and-the-bell-labs-miracle.html.

A nice summary history of the invention of the transistor can be found in “Transistorized!” at PBS’s website: http://www.pbs.org/transistor/album1/. A more detailed history can be found in Chapter 7 of Walter Isaacson’s 2014 book, The Innovators. New York: Simon and Schuster.

Execute Like a Business

“How do I do this?”: from pages xix–xx of McChesney, Chris, Sean Covey, and Jim Huling. The 4 Disciplines of Execution. New York: Simon and Schuster, 2004.

Clayton Christensen also talks more about his experience with Andy Grove in a July–August 2010 Harvard Business Review article, “How Will You Measure Your Life?” that he later expanded into a book of the same name: http://hbr.org/2010/07/how-will-you-measure-your-life/ar/1.

“The more you try to do”: from page 10 of McChesney, Covey, and Huling, The 4 Disciplines of Execution.

“If you want to win the war for attention”: Brooks, David. “The Art of Focus.” New York Times, June 3, 2013. http://www.nytimes.com/2014/06/03/opinion/brooks-the-art-of-focus.html?hp&rref=opinion&_r=2.

“When you receive them”: from page 12 of McChesney, Covey, and Huling, The 4 Disciplines of Execution.

“People play differently when they’re keeping score”: Ibid., 12.

“a rhythm of regular and frequent meetings” and “execution really happens”: Ibid., 13.

Be Lazy

“I am not busy” and “Idleness is not just a vacation”: Kreider, Tim. “The Busy Trap.” New York Times, June 30, 2013. http://opinionator.blogs.nytimes.com/2012/06/30/the-busy-trap/.

Much (though not all) of the research cited to support the value of downtime was first brought to my attention through a detailed Scientific American article on the subject: Jabr, Ferris. “Why Your Brain Needs More Downtime.” Scientific American, October 15, 2013. http://www.scientificamerican.com/article/mental-downtime/.

“The scientific literature has emphasized”: from the abstract of Dijksterhuis, Ap, Maarten W. Bos, Loran F. Nordgren, and Rick B. van Baaren, “On Making the Right Choice: The Deliberation-Without-Attention Effect.” Science 311.5763 (2006): 1005–1007.

The attention restoration theory study described in the text: Berman, Marc G., John Jonides, and Stephen Kaplan. “The Cognitive Benefits of Interacting with Nature.” Psychological Science 19.12 (2008): 1207–1212.

I called this study “frequently cited” based on the more than four hundred citations identified by Google Scholar as of November 2014.

An online article where Berman talks about this study and ART more generally (the source of my Berman quotes): Berman, Marc. “Berman on the Brain: How to Boost Your Focus.” Huffington Post, February 2, 2012. http://www.huffingtonpost.ca/marc-berman/attention-restoration-theory-nature_b_1242261.html.

Kaplan, Rachel, and Stephen Kaplan. The Experience of Nature: A Psychological Perspective. Cambridge: Cambridge University Press, 1989.

Ericsson, K.A., R.T. Krampe, and C. Tesch-Römer. “The Role of Deliberate Practice in the Acquisition of Expert Performance.” Psychological Review 100.3 (1993): 363–406.

“Committing to a specific plan for a goal”: from Masicampo, E.J., and Roy F. Baumeister. “Consider It Done! Plan Making Can Eliminate the Cognitive Effects of Unfulfilled Goals.” Journal of Personality and Social Psychology 101.4 (2011): 667.

Rule #2

My estimate of “hundreds of thousands” of daily Talmud studiers comes from an article by Shmuel Rosner, “A Page a Day,” New York Times, August 1, 2012 (http://latitude.blogs.nytimes.com/2012/08/01/considering-seven-and-a-half-years-of-daily-talmud-study/), as well as my personal correspondence with Adam Marlin.

“So we have scales that allow us to divide” and “The people we talk with continually said”: Clifford Nass’s May 10, 2013, interview with Ira Flatow, on NPR’s Talk of the Nation: Science Friday show. Audio and transcript are available online: “The Myth of Multitasking.” http://www.npr.org/2013/05/10/182861382/the-myth-of-multitasking. In a tragic twist, Nass died unexpectedly just six months after this interview.

Don’t Take Breaks from Distraction. Instead Take Breaks from Focus.

Powers, William. Hamlet’s BlackBerry: Building a Good Life in a Digital Age. New York: Harper, 2010.

“Do what Thoreau did”: “Author Disconnects from Communication Devices to Reconnect with Life.” PBS NewsHour, August 16, 2010. http://www.pbs.org/newshour/bb/science-july-dec10-hamlets_08-16/.

Work Like Teddy Roosevelt

The general information about Theodore Roosevelt’s Harvard habits comes from Edmund Morris’s fantastic biography: Morris, Edmund. The Rise of Theodore Roosevelt. New York: Random House, 2001. In particular, pages 61–65 include Morris’s catalog of Roosevelt’s collegiate activities and an excerpt from a letter from Roosevelt to his mother that outlines his work habits. The specific calculation that Roosevelt dedicates a quarter of his typical day to schoolwork comes from page 64.

“amazing array of interests”: from page 64 of Morris, Rise of Theodore Roosevelt.

The positive receipt of Roosevelt’s book by the Nuttall Bulletin comes from Morris’s endnotes: in particular, note 37 in the chapter titled “The Man with the Morning in His Face.”

“one of the most knowledgeable”: from page 67 of Morris, Rise of Theodore Roosevelt. I ascribed this assessment to Morris, though this is somewhat indirect, as Morris here is actually arguing that Roosevelt’s father, after the publication of The Summer Birds of the Adirondacks, must have felt this about his son.

“The amount of time he spent at his desk”: from page 64 of Morris, Rise of Theodore Roosevelt.

Memorize a Deck of Cards

Quotes from Daniel Kilov came from personal correspondence. Some background on his story was taken from his online biography, http://mentalathlete.wordpress.com/about/, and Lieu Thi Pham. “In Melbourne, Memory Athletes Open Up Shop.” ZDNet, August 21, 2013. http://www.smartplanet.com/blog/global-observer/in-melbourne-memory-athletes-open-up-shop/. More on Kilov’s scores (memory feats) from his two medal-winning championship bouts can be found on the World Memory Statistics website: http://www.world-memory-statistics.com/competitor.php?id=1102.

Foer, Joshua. Moonwalking with Einstein: The Art and Science of Remembering Everything. New York: Penguin, 2011.

“We found that one of the biggest differences”: Carey, Benedict. “Remembering, as an Extreme Sport.” New York Times Well Blog, May 19, 2014.

For more interesting connections between memorization and general thought, see: The Art of Memory, by Frances A. Yates, which was first published in 1966. The most accessible version seems to be the handsome 2001 reprint by the University of Chicago Press.

Rule #3

“the most connected man in the world”; “I was burnt out”; “By the end of that first week”; “The end came too soon”; and general information about Baratunde Thurston’s experiment: from the Baratunde Thurston article “#UnPlug” that appeared in the July–August 2013 issue of Fast Company. http://www.fastcompany.com/3012521/unplug/baratunde-thurston-leaves-the-internet.

The reference to Thurston’s Twitter usage refers to the tweets on March 13, 2014, from the Twitter handle @Baratunde.

“Entertainment was my initial draw”; “[When] I first joined”; and “[I use] Facebook because”: drawn from comments sections of the following two blog posts I wrote in the fall of 2013:

• “Why I’m (Still) Not Going to Join Facebook: Four Arguments That Failed to Convince Me.” http://calnewport.com/blog/2013/10/03/why-im-still-not-going-to-join-facebook-four-arguments-that-failed-to-convince-me/.

• “Why I Never Joined Facebook.” http://calnewport.com/blog/2013/09/18/why-i-never-joined-facebook/.

For more on Forrest Pritchard and Smith Meadows Farms: http://smithmeadows.com/.

Apply the Law of the Vital Few to Your Internet Habits

“Who says my fans want to hear from me”: from a Malcolm Gladwell talk that took place at the International Digital Publishing Forum as part of the 2013 BookExpo America Convention, held in May 2013, in New York City. A summary of the talk, including the quotes excerpted in this chapter, and some video excerpts, can be found in “Malcolm Gladwell Attacks NYPL: ‘Luxury Condos Would Look Wonderful There,’” Huffington Post, May 29, 2013. http://www.huffingtonpost.com/2013/05/29/malcolm-gladwell-attacks-_n_3355041.html.

“I don’t tweet” and “It’s amazing how overly accessible”: from the following Michael Lewis interview: Allan, Nicole. “Michael Lewis: What I Read.” The Wire, March 1, 2010. http://www.thewire.com/entertainment/2010/03/michael-lewis-what-i-read/20129/.

“And now, nearly a year later”: from “Why Twitter Will Endure,” by David Carr for the New York Times in January 2010: http://www.nytimes.com/2010/01/03/weekinreview/03carr.html.

“Twitter is crack for media addicts”: from an online opinion piece written for the New Yorker website: Packer, George. “Stop the World.” The New Yorker, January 29, 2010. http://www.newyorker.com/online/blogs/georgepacker/2010/01/stop-the-world.html.

The law of the vital few is discussed in many sources. Richard Koch’s 1998 book, The 80/20 Principle (New York: Crown, 1998), seems to have helped reintroduce the idea to a business market. Tim Ferriss’s 2007 mega-seller, The 4-Hour Workweek (New York: Crown, 2007), popularized it further, especially among the technology entrepreneur community. The Wikipedia page on the Pareto principle has a good summary of various places where this general idea applies (I drew many of my examples from here): http://en.wikipedia.org/wiki/Pareto_principle.

Quit Social Media

“Everything’s more exciting when it’s a party” and general information on Ryan Nicodemus’s “packing party”: “Day 3: Packing Party.” The Minimalists. http://www.theminimalists.com/21days/day3/.

Average number of Twitter followers statistic comes from: “Average Twitter User Is an American Woman with an iPhone and 208 Followers.” Telegraph, October 11, 2012. http://www.telegraph.co.uk/technology/news/9601327/Average-Twitter-user-is-an-an-American-woman-with-an-iPhone-and-208-followers.html.

Take this statistic with a grain of salt. A small number of Twitter users have such a large following that the average skews high. Presumably the median would be much lower. But then again, both statistics include users who signed up just to try out the service or read tweets, and who made no serious attempt to ever gain followers or write tweets. If we confined our attention to those who actually tweet and want followers, then the follower numbers would be higher.

Don’t Use the Internet to Entertain Yourself

“Take the case of a Londoner who works”; “great and profound mistake”; “during those sixteen hours he is free”; and “What? You say that full energy”: from Chapter 4 in Bennett, Arnold. How to Live on 24 Hours a Day. Originally published in 1910. Quotes are from the free version of the text maintained in HTML format at Project Gutenberg: http://www.gutenberg.org/files/2274/2274-h/2274-h.htm.

Rule #4

“People should enjoy the weather in the summer” and general notes on Jason Fried’s decision to move 37signals (now Basecamp) to a four-day workweek: “Workplace Experiments: A Month to Yourself.” Signal v. Noise, May 31, 2012. https://signalvnoise.com/posts/3186-workplace-experiments-a-month-to-yourself.

“Packing 40 hours into four days”: from a Forbes.com critique of Fried: Weiss, Tara. “Why a Four-Day Work Week Doesn’t Work.” Forbes. August 18, 2008. www.forbes.com/2008/08/18/careers-leadership-work-leadership-cx_tw_0818workweek.html.

“The point of the 4-day work week is” and “Very few people work even 8 hours a day”: from Fried’s response on his company’s blog: “Forbes Misses the Point of the 4-Day Work Week.” Signal v. Noise, August 20, 2008. http://signalvnoise.com/posts/1209-forbes-misses-the-point-of-the-4-day-work-week.

“I’d take 5 days in a row”: from Fried’s company’s blog: “Workplace Experiments.” https://signalvnoise.com/posts/3186-workplace-experiments-a-month-to-yourself.

“How can we afford to”: from an Inc.com article: Fried, Jason. “Why I Gave My Company a Month Off.” Inc., August 22, 2012. http://www.inc.com/magazine/201209/jason-fried/why-company-a-month-off.html.

The notes on how many hours a day of deliberate practice are possible come from page 370 of: Ericsson, K.A., R.T. Krampe, and C. Tesch-Römer. “The Role of Deliberate Practice in the Acquisition of Expert Performance.” Psychological Review 100.3 (1993): 363–406.

Schedule Every Minute of Your Day

The statistics about British TV habits come from this Guardian article, by Mona Chalabi, published on October 8, 2013: “Do We Spend More Time Online or Watching TV?” http://www.theguardian.com/politics/reality-check/2013/oct/08/spend-more-time-online-or-watching-tv-internet.

The Laura Vanderkam article in the Wall Street Journal: “Overestimating Our Overworking,” May 29, 2009, http://online.wsj.com/news/articles/SB124355233998464405.

“I think you far understate”: from comment #6 of the blog post “Deep Habits: Plan Your Week in Advance,” August 8, 2014. http://calnewport.com/blog/2014/08/08/deep-habits-plan-your-week-in-advance.

Finish Your Work by Five Thirty

“Scary myths and scary data abound” and general information about Radhika Nagpal’s fixed-schedule productivity habit:

“The Awesomest 7-Year Postdoc or: How I Learned to Stop Worrying and Love the Tenure-Track Faculty Life,” Scientific American, July 21, 2013. http://blogs.scientificamerican.com/guest-blog/2013/07/21/the-awesomest-7-year-postdoc-or-how-i-learned-to-stop-worrying-and-love-the-tenure-track-faculty-life/.

Matt Welsh’s quote about typical travel for junior faculty: “The Fame Trap.” Volatile and Decentralized, August 4, 2014. http://matt-welsh.blogspot.com/2014/08/the-fame-trap.html.

The issue of Science where Radhika Nagpal’s work appears on the cover: http://www.sciencemag.org/content/343/6172.toc; Science 343.6172 (February 14, 2014): 701–808.

Become Hard to Reach

“we are slowly eroding our ability to explain”: from page 13 of Freeman, John. The Tyranny of E-mail: The Four-Thousand-Year Journey to Your Inbox. New York: Scribner, 2009.

To see my sender filters in action: http://calnewport.com/contact/.

“So, when I emailed Cal to ask if he”: Glei, Jocelyn. “Stop the Insanity: How to Crush Communication Overload.” 99U, http://99u.com/articles/7002/stop-the-insanity-how-to-crush-communication-overload.

“At some point, the number of people reaching out” and more details on Clay Herbert and Antonio Centeno’s filters: Simmons, Michael. “Open Relationship Building: The 15-Minute Habit That Transforms Your Network.” Forbes, June 24, 2014. http://www.forbes.com/sites/michaelsimmons/2014/06/24/open-relationship-building-the-15-minute-habit-that-transforms-your-network/.

Notice, this Forbes.com article also talks about my own sender filter habit. (I suggested the name “sender filter” to the article’s author, Michael Simmons, who is also a longtime friend of mine.)

See Antonio’s filters in action: http://www.realmenrealstyle.com/contact/.

“Develop the habit of letting small bad things happen”: from Tim Ferriss’ blog: “The Art of Letting Bad Things Happen.” The Tim Ferriss Experiment, October 25, 2007. http://fourhourworkweek.com/2007/10/25/weapons-of-mass-distractions-and-the-art-of-letting-bad-things-happen/.

Conclusion

“a prodigious feat of concentration”: from an article for the Harvard Gazette: Isaacson, Walter. “Dawn of a Revolution,” September 2013. http://news.harvard.edu/gazette/story/2013/09/dawn-of-a-revolution/.

“The one trait that differentiated [Gates from Allen] was focus”: Isaacson, Walter. The Innovators. New York: Simon and Schuster, 2014. The quote came from 9:55 into Chapter 6 of Part 2 in the unabridged Audible.com audio version of the book.

The details of the Bill Gates story came mainly from Isaacson, “Dawn of a Revolution,” article, which Walter Isaacson excerpted (with modification) from his Innovators. I also pulled some background details, however, from Stephen Manes’s excellent 1994 business biography. Manes, Stephen. Gates: How Microsoft’s Mogul Reinvented an Industry - and Made Himself the Richest Man in America. New York: Doubleday, 1992.

Newport, Cal. So Good They Can’t Ignore You: Why Skill Trumps Passion in the Quest for Work You Love. New York: Business Plus, 2012.

You can find a list of my computer science publications, organized by year, at my academic website: http://people.cs.georgetown.edu/~cnewport. The publications from my year of living deeply are listed under 2014. Notice that theoretical computer scientists, like myself, publish mainly in competitive conferences, not journals, and that we tend to list authors alphabetically, not in order of contribution.

“I’ll live the focused life”: from page 14 of Gallagher, Rapt.

1. The complex reality of the technologies that real companies leverage to get ahead emphasizes the absurdity of the now common idea that exposure to simplistic, consumer-facing products - especially in schools - somehow prepares people to succeed in a high-tech economy. Giving students iPads or allowing them to film homework assignments on YouTube prepares them for a high-tech economy about as much as playing with Hot Wheels would prepare them to thrive as auto mechanics.

2. After Malcolm Gladwell popularized the idea of deliberate practice in his 2008 bestseller, Outliers: The Story of Success, it became fashionable within psychology circles (a group suspicious, generally speaking, of all things Gladwellian) to poke holes in the deliberate practice hypothesis. For the most part, however, these studies did not invalidate the necessity of deliberate practice, but instead attempted to identify other components also playing a role in expert performance. In a 2013 journal article, titled “Why Expert Performance Is Special and Cannot Be Extrapolated from Studies of Performance in the General Population: A Response to Criticisms,” and published in the journal Intelligence 45 (2014): 81–103, Ericsson pushed back on many of these studies. In this article, Ericsson argues, among other things, that the experimental designs of these critical papers are often flawed because they assume you can extrapolate the difference between average and above average in a given field to the difference between expert and non-expert.

3. In the United States, there are three ranks of professors: assistant, associate, and full. You’re typically hired as an assistant professor and promoted to associate professor when you receive tenure. Full professorship is something that usually requires many years to achieve after tenure, if you achieve it at all.

4. Lexical decision games flash strings of letters on the screen; some form real words, and some do not. The player has to decide as quickly as possible if the word is real or not, pressing one key to indicate “real” and another to indicate “not real.” These tests allow you to quantify how much certain keywords are “activated” in the player’s mind, because more activation leads the player to hit the “real word” quicker when they see it flash on the screen.

5. In Part 2, I go into more detail about why this claim is not necessarily true.

6. I’m being somewhat loose in my use of the word “individualized” here. The monastic philosophy does not apply only to those who work by themselves. There are examples of deep endeavors where the work is done among a small group. Think, for example, of songwriting teams like Rodgers and Hammerstein, or invention teams like the Wright brothers. What I really mean to indicate with my use of the term is that this philosophy applies well to those who can work toward clear goals without the other obligations that come along with being a member of a larger organization.

7. Supporters of open office plans might claim that they’re approximating this mix of depth and interaction by making available conference rooms that people can use as needed to dive deeper into an idea. This conceit, however, trivializes the role of deep work in innovation. These efforts are not an occasional accompaniment to inspirational chance encounters; they instead represent the bulk of the effort involved in most real breakthroughs.

8. You can see a snapshot of my “hour tally” online: “Deep Habits: Should You Track Hours or Milestones?” March 23, 2014, http://calnewport.com/blog/2014/03/23/deep-habits-should-you-track-hours-or-milestones/.

9. There is some debate in the literature as to whether these are the exact same quantity. For our purposes, however, this doesn’t matter. The key observation is that there is a limited resource, necessary to attention, that must be conserved.

10. The specific article by White from which I draw the steps presented here can be found online: Ron White, “How to Memorize a Deck of Cards with Superhuman Speed,” guest post, The Art of Manliness, June 1, 2012, http://www.artofmanliness.com/2012/06/01/how-to-memorize-a-deck-of-cards/.

11. Notice, the Internet sabbatical is not the same as the Internet Sabbath mentioned in Rule #2. The latter asks that you regularly take small breaks from the Internet (usually a single weekend day), while the former describes a substantial and long break from an online life, lasting many weeks - and sometimes more.

12. It was exactly this type of analysis that supports my own lack of presence on Facebook. I’ve never been a member and I’ve undoubtedly missed out on many minor benefits of the type summarized above, but this hasn’t affected my quest to maintain a thriving and rewarding social life to any noticeable degree.

13. This idea has many different forms and names, including the 80/20 rule, Pareto’s principle, and, if you’re feeling particularly pretentious, the principle of factor sparsity.

14. The studies I cite are looking at the activity of deliberate practice - which substantially (but not completely) overlaps our definition of deep work. For our purposes here, deliberate practice is a good specific stand.in for the general category of cognitively demanding tasks to which deep work belongs.