Very closely related to Fogg's behavior model of "trigger", "execution", "motivation", Charles Duhigg in "The Power of Habit" writes of the steps of the habit l

Very closely related to Fogg's behavior model of "trigger", "execution", "motivation", Charles Duhigg in "The Power of Habit" writes of the steps of the habit loop as "cue", "routine", "reward". Habit is coming up to be a big topic in app design and development. "The Power of Habit" is a good read which systematically lays out some science behind what habits are, how they work, and how to leverage them.