I put together www.chessrapid.com for my own use. It's a version of Puzzle Rush / Puzzle Storm that has the added benefit of: 1) filtering by tactical themes and 2) seeing what themes you are frequently slow on / incorrect on. This way I can narrow in on the tactical themes that I need to improve pattern recognition on (e.g. I can take a break from Mate in 1 and Mate in 2; I really need to work on middle game).
I imagine something like a local text file / draft email (because I always have my email open)?
The problem I run into is that I'm either running from thing to thing so there doesn't seem to be much time to write things down as they happen OR I run out of steam at the end of the day and I don't prioritize "write things down".
Any data on whether founders with this type of relationship have a lower, the same, or higher probability of having founder disputes that destroy the company?