Tiny Habits: The Small Changes That Change Everything (2019) is by BJ Fogg, a behavior scientist who founded the Behavior Design Lab at Stanford University. The book turns his research into a method anyone can try in a week. Six ideas from it worth keeping.

1. Behavior happens when motivation, ability, and a prompt arrive together. Fogg calls this the Fogg Behavior Model, B=MAP. If a behavior doesn't happen, at least one of the three is missing. Most people assume it's always motivation. Usually it isn't.

2. Motivation is the least reliable lever. It rises and falls with mood, sleep, and the week you're having. Fogg argues that a plan built on high motivation fails on the first bad day, so the smarter move is to design for the low days.

3. Make the behavior tiny. If ability is the lever you can control, shrink the task until it takes almost no effort. Floss one tooth. Do two push-ups. Write one sentence. A behavior that small needs almost no motivation, which is the point.

4. Anchor it to something you already do. The prompt is the part people forget. Fogg's recipe is a single sentence: "After I [existing habit], I will [tiny behavior]." The existing habit becomes the reminder, so you don't rely on memory or an alarm.

5. Celebrate immediately. After the tiny behavior, Fogg has you create a small moment of positive feeling — a smile, a fist pump, a quiet "nice." His theory is that emotion, not repetition, is what wires a habit in. That is his claim, and it's a useful one to test on yourself.

6. Let the habit grow on its own. Once two push-ups feel automatic, doing more becomes easy and often happens naturally. You don't force the scale-up. The book also treats a missed day as information about the design, not as a character flaw.

Takeaway

After the next thing you already do every morning (pouring coffee, brushing your teeth), do one absurdly small version of the habit you want — two push-ups, one flossed tooth, one sentence written. Then say "nice" out loud or smile. Do it today.

One honest caveat: much of the evidence behind the method comes from Fogg's own programs and from practitioner reports, not from large independent trials. Treat it as a well-designed experiment to run, not a guarantee. The cost of trying is about ten seconds a day.