There is this nice book called "The Slight Edge" which builds on this whole idea in general and how it is applicable at every facet of life. It is really an insightful book and atleast you will slightly change about how you think about stuffs.
I'm reading *Atomic Habits right now and the author talks about how building small improvements on top of each other can eventually deliver great gains. The trick seems to be identifying just what it is to work on.
