Whenever I have trouble getting back into a game I like to make my own setup and rules summary to make it easier in the future. These are intended for myself only so they take shortcuts and make assumptions about how I think about the setup and play and even our typical player count (2). I will share an example in a comment.
Do you ever do something like this?
I regularly do, especially for verbose rulebooks or rulebooks that are badly designed for quick reference while playing.