What It Means
Habit stacking means attaching a new habit to something you already do every day, so the old habit acts as the reminder for the new one. James Clear, who uses the name on his site and in his book Atomic Habits, writes it as a formula: "After [current habit], I will [new habit]." Behavior scientist BJ Fogg's Tiny Habits method uses the same "After I" shape and calls the existing routine the anchor.
Try It: Build Your First Habit Stack
Pick something you already do every day, then a new habit to hang on it.
After I pour my morning coffeebrush my teeth at nightsit down to dinnertake off my work shoes, I will write one line in a journalfloss one toothsay one thing I'm grateful forgo for a 45-minute run.
That's a big step to hang on an anchor. Fogg's recipes use tiny behaviors, such as flossing one tooth. Try "put on my running shoes" first.
Small enough to do even on a bad day, which is the size Fogg's recipes aim for.
How People Say It
- "After I start the coffee, I do my stretches. That's my stack."
- "I floss right after I brush now, it's automatic."
- "I tied my vitamins to my morning coffee and I haven't missed a day."
The Breakdown
How to build one
- List things you already do every day without fail, such as making coffee, brushing your teeth or sitting down to dinner. Fogg calls these anchors.
- Pick the new habit and shrink it until it takes a minute or two.
- Write the sentence: "After I [anchor], I will [new habit]."
- Do the new habit right after the anchor, every time, so one leads straight into the other.
Examples from the two authors
| Anchor | New habit | Whose example |
|---|---|---|
| Pour my morning coffee | Meditate for one minute | James Clear |
| Take off my work shoes | Change into workout clothes | James Clear |
| Sit down to dinner | Say one thing I'm grateful for | James Clear |
| Brush my teeth | Floss one tooth | BJ Fogg |
| Sit down on the train | Take three deep breaths | BJ Fogg |
Quick self-check. A good anchor happens every day, at a set point, and you never forget it. If you can't say exactly when your anchor happens, pick a steadier one.
A way to start at home. Stacks work for a household too. Buhata's suggestion: "After we clear the dinner table, we'll each put one thing back where it lives."
Where It Comes From
James Clear writes about habit stacking on jamesclear.com and in his book Atomic Habits. BJ Fogg, a behavior scientist profiled by Stanford Lifestyle Medicine, teaches the same "After I" recipe in his Tiny Habits method, where the existing routine is called the anchor and the new behavior is kept tiny.
Good to Know
Clear's reasoning is that a habit you already do is wired in, so linking a new behavior to it gives the new one a ready-made cue. Like any habit, a stacked one still takes repetition to feel automatic. In Lally and colleagues' study, the median was 66 days, with individual estimates from 18 to 254 days. Keep the new habit small at first, the way both authors' examples are: one minute of meditation, one tooth flossed.
FAQ
What is the habit stacking formula?
James Clear writes it as "After [current habit], I will [new habit]." For example: after I pour my cup of coffee each morning, I will meditate for one minute.
Who came up with habit stacking?
James Clear uses the name habit stacking on his site and in Atomic Habits. BJ Fogg teaches the same "After I" recipe in his Tiny Habits method, calling the existing routine the anchor.
How many habits can I stack at once?
Neither author's examples set a number, and each recipe pairs one anchor with one new habit. Buhata's suggestion is to add one stack, keep it until it feels easy, and then add the next.
Do It in Buhata
Habit streaks (Plus) and Reminders
Write your stack as the name of a habit in Habit streaks (Plus) in Buhata, such as "After coffee: one journal line," and tick it each day.
Open BuhataRelated Terms and Categories
- Habit loop
The three-part pattern behind a habit, as described by Charles Duhigg: a cue that triggers it, the routine you do, and the reward that makes it stick.
- Implementation intention
An if-then plan that ties a goal to a specific moment: "If situation X happens, then I will do Y."
- Keystone habit
A habit that tends to set off changes in other habits, such as regular exercise leading to better eating, as described by Charles Duhigg.
Sources
James Clear, "Habit Stacking: How to Build New Habits by Taking Advantage of Old Ones" (jamesclear.com); BJ Fogg, Tiny Habits, "Design Your Habits" (tinyhabits.com); Tiny Habits, "Design a New Habit" worksheet (tinyhabits.com); Stanford Lifestyle Medicine, "Leading Behavior Scientist BJ Fogg, PhD: Not Your Traditional Academic"
- jamesclear.com/habit-stacking
- tinyhabits.com/design
- tinyhabits.com/wp-content/uploads/2021/01/TinyHabits-Design-New-Habit.pdf
- lifestylemedicine.stanford.edu/leading-behavior-scientist-bj-fogg-phd-not-your-traditional-academic
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