James Clear's Habit Stacking: Pin the New Habit to an Old One

"Meditate more" names a behavior but no moment to do it in. Habit stacking borrows a moment you already have. You make coffee every morning without deciding to, so the coffee can carry the new habit.

On The Diary of a CEO in December 2025, Clear credits the idea to Fogg, who calls it the tiny habits recipe, and states the insight like this:

His standard example is the same on every show: After I make my morning cup of coffee, I will meditate for 60 seconds. Clear adds two things around that sentence. One is a written list of your day, to see where a new habit could fit. The other is chaining, where one stacked habit becomes the anchor for the next.

1. Write out your day before you add anything. Clear calls this the habit scorecard. List what you do from waking: drink a glass of water, shower, check your phone, get dressed. Mark each one plus if it helps, minus if you want it gone, equals if it is neutral. Don't judge the list. Clear compares it to watching lions at the zoo. The finished list is where you look for anchors.
2. Pick an anchor that happens every day. Coffee works because you already make it every morning. Atomic Habits adds a fit test (paraphrased here, not quoted): the anchor should happen reliably, at a time, place and energy level that suit the new habit.
3. Write the sentence, and make the new habit small. Clear's two-minute rule scales any habit down to two minutes or less. Meditate for 20 minutes becomes meditate for one. Read 30 books a year becomes read one page. Do yoga four days a week becomes take out my yoga mat.
4. Put it in an hour you control. As a rule, earlier is better. The later it gets, the more room there is for someone else's agenda or an emergency to push the habit out. On Huberman Lab he put the real question this way:

Meditating after coffee suits someone without kids. With toddlers who need their pants on, that hour belongs to them.

5. Chain once the first link holds. After I make my coffee, I will meditate for 60 seconds. After I meditate, I will write my to-do list. After I write the list, I will prioritize it and start the first task. You run the same sequence every morning.
6. Stack on your linchpin. Clear asks which of his habits are upstream from other good things happening. His three are a workout, some reading and one written sentence. Reading and writing come easier after he trains, so the workout goes first and the rest follows it.
7. Rearrange until it fits. Clear says he set out to write the single best book on habits, and that even so:

Move the new habit to a different anchor, or change when you insert it.

Stacks people have told Clear about, from the same interviews: a gym regular with messy finances who checks his daily budget whenever he makes a protein shake. A woman who hangs up her jacket and purse, fills her water bottle, sits down and answers the first email, in that order, every time she walks into the office. A woman in her 60s who brushes her teeth standing on one leg, does ten half squats, then switches legs. Her balance is better, her legs are stronger and her teeth are very clean.

Works best when the anchor is automatic and daily, and the new habit is small enough to do on the spot.

Fails when the hour belongs to someone else, like a parent getting toddlers dressed.

Fails when the new habit needs a different place or a different energy level than the anchor, or when you stack several new habits at once. Both are on the book's list of common mistakes (paraphrased).

Fails when you treat the stack as a 30-day project. Clear's answer to how long a habit takes:

Repetition makes a stacked habit smoother and less effortful, Clear says, but it won't run itself. Writing every day will never be as mindless as brushing your teeth, and going to the gym won't turn as automatic as tying your shoes.