Atomic Habits
In the book 'Atomic Habits', James Clear explains that habits are formed from the following 4 step cycle:
Cue, Craving, Response, Reward
The cue triggers a craving, which motivates a response, which provides a reward, which satisfies the craving and then becomes associated with the cue.
This cycle is known as the habit loop.
If we want to form new habits, we should make them obvious, attractive, easy, and satisfying, in order to overcome that habit loop.
When working with clients, we encourage them to think of one very small, observable behaviour that could be done at the cue or craving point. As Clear says, this behaviour should be obvious & easy and lead to attractive new habits that bring satisfaction.
We can also use a habit tracker as a fun way to measure progress.