Yeah, some habits (like exercise and sleeping well) are mutually reinforcing and it can be hard to introduce either one in isolation.

Reminds me of this attempt[0] I recently ran across to identify the central nodes of a habit network. A neat idea, and one I hadn't seen before, despite a pretty good familiarity with the literature of habit formation.

[0] https://medium.com/forte-labs/mapping-the-habit-graph-13e851...