Atomic Habits Book Notes

Atomic Habits Book Notes

Atomic Habits by James Clear gives structure to habit-building through dozens of real-life stories. It details powerful, practical principles to help you live the way you want to live.

Key takeaways

  • Tiny changes compound to breed big gains or big losses

  • Identity, systems/habits, and goals are intertwined

  • Focus on systems over goals

  • Make good habits obvious, attractive, easy, and satisfying

Table of contents


The Fundamentals

Tiny changes, remarkable results

Image by James Clear

Image by James Clear

Habits matter (Chp. 1)

  • Habits have small outcomes, which compound, leading to big gains or big losses long-term

  • Small decisions also add up to a good or bad day or week (Chp. 13)

Focus on systems over goals (Chp. 1)

  • Systems are how you achieve your goals. They include things like habits.

  • You don’t rise to the level of your goals, you fall to the level of your systems.

  • Focusing on goals over systems restricts happiness and is unsustainable

Image by James Clear

Image by James Clear

Identity matters (Chp. 2)

  • Identity, systems, and goals all impact each other, so they are all important

  • Change your identity to change your habits (go inside out)

    • e.g., if you go about quitting junk food as a junk food lover, change will be like holding back a train—you are bound to fail long-term. Instead, become someone who loves eating healthy, so each healthy choice feels good and you will make long-term progress.

  • Habits impact your identity, casting votes for desired or undesired identities

    • Every time you show up to work out, you cast a vote for being someone who never misses a workout. Every time you miss a workout, you cast a vote for someone who doesn’t care about working out.

Image by James Clear

Image by James Clear

Habit stages (Chp. 3)

  1. Cue: trigger that puts the habit on your radar

  2. Craving: underlying motivation to do the habit or not

  3. Response: doing habit or not

  4. Reward: good/bad feeling resulting from action


Make it Obvious or Invisible (cue)

Visibility of cues controls possibility of action.

How to get aware of your habits

Habit scorecard (Chp. 4)

  • Not related to cues or making cues obvious/invisible. Just for increasing awareness of your habits so you know what to change. If you aren’t conscious about your habits, you won’t know what to change in them!

  1. Write down all daily habits (e.g., brush teeth, cook).

  2. Mark them +/-/=. + for good habits, - for bad habits, = for neutral habits.

  3. Use this to figure out what habits to change

How to make good habits obvious and bad habits invisible

Implementation intention (Chp. 5)

  • Say aloud “I will do [habit/task] at [time, location, & other details]”

  • Works cuz:

    • Saying it aloud gets it out of your muddy thoughts and into clear words

    • We want to keep our word

Habit stacking (Chp. 5)

  • Add new habits right before/after existing habits to make a string of habits

  • Works cuz previous habit gives momentum + serves as a cue

Environment design (Chp. 6)

  • Customize an environment and the cues in it to control short & long-term behavior

    • e.g., hide video game controllers in drawers so you forget to play video games, put a book out on the table so you are prompted to read a book instead.

  • Works cuz

    • Environment is very visible & tangible

    • Avoiding temptation is much easier than resisting. (Chp. 7)

Context design (Chp. 6)

  • Do certain things in certain environments to control each environment’s context (what activities and feelings you associate with the environments)

    • e.g., watching tv in living room -> living room = fun area, not work area; stop using phone in bed, only sleep in bed -> bedroom = sleep area, not awake area and you fall asleep easier

  • Context/entire environment can be a cue


Make it Attractive or Unattractive (craving)

Attraction to a habit controls motivation to follow through or not

How to make good habits attractive and bad habits unattractive

Temptation bundling (Chp. 8)

  • Put a liked activity after a non-liked habit

  • e.g., write 10 pages then watch a YT video

Design the cultures/groups of people you are in (Chp. 9)

  • Cultures: the close (fam & friends), the many (groups), the powerful (role models)

  • Join culture where

    • good habits are normal and praised

    • y’all already share something in common to fit in

Highlight good/bad of habit (Chp. 10)

Happy ritual before habit increases attraction to habit (Chp. 10)

  • Works cuz you will associate habit w/ positive feelings


Make it Easy or Difficult (response)

We do what is easiest (law of least effort, Chp. 12)

Strategies to make good habits easy and bad habits difficult

Stop planning, just get in action and improve from there (Chp. 11)

Environment design (Chp. 12)

  • e.g., prepare gym bag to make going to gym easy

Always show up (Chp. 13)

  • Showing up is most important

    • Show up => habit is easier to do, don’t show up => impossible to do habit

    • # reps controls automaticity (Chp. 11)

  • Habit shaping

    • Progress habit incrementally over time

    • Start by showing up only, then add more and more

  • 2 Min Rule (do only 2 min of habit to start)

    • learn to show up + builds ritual

    • Rituals prepare you for easier deep focus

Commitment device/Ulysses Contract (intensely lock in future behavior) (Chp. 14)

  • e.g., cut out internet after 8pm to go to bed

Onetime choices in many forms can help (Chp. 14)

  • e.g., get blackout curtains, permanently delete video games, get voluntarily banned on websites

Automate for commitment or ease (Chp. 14)

  • e.g., use a microsavings app


Make it Satisfying or Unsatisfying (reward)

Immediate reward -> repeat, immediate punish -> avoid (cardinal rule of behavior change, Chp. 15)

Strategies to make good habits satisfying and bad habits unsatisfying

Make immediate rewards/punishments (Chp. 15)

  • immediate > delayed

  • Get creative

Habit tracking (Chp. 16)

  • Visible progress—makes habits obvious, attractive, & satisfying

  • Can automate, but manually track most important habits

  • Pick good metrics + don’t focus on metrics to cheat (cuz Goodhart’s law)

  • Never miss twice in a row

    • Show up, even just for a bit (reaffirms ID, continues streak, prevents downward spiral)

Accountability (do it right) (Chp. 17)

  • Works cuz we are under watch + want to maintain status & trust of keeping our word

Habit contracts (success -> reward, fail -> some punishment) (Chp. 17)


Advanced (good -> great)

Consistent + exceptional long term improvement is desired can be hard

Strategies for consistent, exceptional, long term progress:

Play games you can win (for exceptionalism and ease) (Chp. 18)

  • Know who you are and build habits accordingly to make it easy

    • Interests, strengths, etc.

    • Personality

      • Openness to experience (curious vs. cautious + consistent)

      • Conscientiousness (organized + efficient vs. easygoing + spontaneous)

      • Extroversion

      • Agreeableness

      • Neuroticism (anxiousness and short-tempered vs calm)

Image by James Clear

Image by James Clear

Goldilocks rule (peak motivation + focus @ edge of ability) (Chp. 19)

  • Don’t want easy + bored or hard + discouraged

Must show up even when supposedly don’t want to (Chp. 19)

Periodically reflect & iterate (Chp. 20)

  • Automaticity => unnoticed small deteriorations => big losses

Keep identity small => minimize identity crisis => smoother transitions => keep improving! (Chp. 20)

  • e.g., instead of “I’m a programmer”, say “I’m someone who loves building things and solving problems”

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