The useful version of habit stacking
Habit stacking means attaching a new action to an event that already happens. The useful sentence is: After [existing routine], I will [small action] in [place]. It is a cue design exercise, not a promise that a routine becomes automatic immediately.
The term comes from Atomic Habits. Our Atomic Habits summary shows how it fits with the book's four laws and why if-then planning research backs it.
Examples by part of the day
After making coffee: read one page, review three phrases, or write one sentence. Keep the material beside the mug rather than in another room.
After putting away lunch: walk for five minutes or stretch once. Choose a route or space that does not require a second decision.
After opening your laptop: write the question your study session will answer. Start with recall before opening your notes; the study session guide explains the difference.
After brushing your teeth: put your phone outside the bedroom or write tomorrow's first task. If the evening is already crowded, use the one-minute version.
After closing a book: write the next page or section you want to open tomorrow. A reading habit is easier to resume when the next start is visible.
When the stack breaks
If the existing routine does not happen reliably, choose an event rather than a clock time: arriving home, finishing a meal, or putting on shoes. If the event disappears, use a second cue you wrote down in advance. Do not add five new habits to one routine; test one stack and observe whether the cue leaves enough room.
Use the Habit Stacking Builder to make an editable draft, or use the 30-day plan builder for a longer first-week experiment.
A seven-day test
For seven days, record only three things: did the cue happen, did you start, and what made starting easier or harder? At the end, keep the stack, change the action size, or choose another existing routine. The goal is to learn which context works for you.
To keep the record going after the first week, see how to use a habit tracker.
For more small actions to stack, see 60 micro habit examples, and use the habit scorecard to find the habits you already do every day, which make the best anchors.
Stacks work even better with something to look forward to. Temptation bundling pairs the new habit with a treat you only get during it, such as a podcast only while you walk.
Want a plan shaped around your own reason and obstacles?
Build my habit building plan 
