https://matt.might.net/articles/how-to-change-your-behavior/
In theory, behavior change should be easy.
At first glance, it seems like you control your behavior.
So, if you desire different behavior, why doesn’t your behavior change as instantly as your desire to change it?
In short, lasting change of habitual behaviors is a multi-stage process.
In 1977, as psychologists James Prochaska and Carlo DiClemente were studying the behavior of smokers, they identified these stages.
Their transtheoretical model of behavior change captures the process of behavior change in six different phases: (1) precontemplation; (2) contemplation; (3) preparation; (4) action; (5) maintenance; and (6) relapse.