What is BJ Fogg behavior model?

Example: Every afternoon around 2:30, you stand up from your desk, walk to the break room, and eat a cookie. You have tried to stop. You have told yourself you will not do it today. By 2:45 you are holding a cookie. The habit persists because you have been attacking only the routine — the eating — while ignoring the cue and the reward. The cue is not hunger. It is 2:30 p.m. plus a drop in mental energy plus the social environment of the break room. The reward is not sugar. It is a ten-minute break from focused work and a brief social interaction with whoever else is in the break room. Once you identify that the cue is an energy dip and the reward is social relief, you can substitute the routine entirely: at 2:30, walk to a colleague desk for a five-minute conversation, then return. The cue fires, the reward lands, and no cookie is involved. You changed the routine because you understood the anatomy.

This concept is part of Habit Architecture in the How to Think curriculum.