I actually still use pen and paper for certain things that are easier, e.g. planning out rows of different crops in Stardew Valley preparing for a new season so I know exactly how many seeds to buy in the morning. I think our flavors of ADHD will determine what works best for each of us, but god damn the notes feature in steam is helpful

Steam overlay has a “Notes” feature to keep your thoughts and allows you to resize however you want and optionally overlay it on top of your game instead of having it hide when you minimize the steam overlay, for quick referencing recipes/guide info etc. it also persists through sessions. I frequently use this in survival games or rogue like games to write myself a debrief before I get off at the end of the night knowing that I won’t remember certain details tomorrow.