Well, some sort of log, be it paper or a text file of whatever works for you. Keeping track of the decisions you make, both to do things and to NOT DO THINGS (

Well, some sort of log, be it paper or a text file of whatever works for you. Keeping track of the decisions you make, both to do things and to NOT DO THINGS (and why) is almost a superpower. You can save so much time when you come up with a 'new but vaguely familiar' idea by being able to check back through your notes and see what you came up with last time it occurred to you. Maybe circumstances changed, maybe they haven't, but you can bring yourself back up to speed on what you've done previously with little effort.