I would support some ingame notetaking as well. I usually plan which city or which castle techs up to which unit or building first and of course, it's almost impossible to keep track of all of it if you're micromanaging. That and planning attacks, sending agents, etc. Whenever I play a game again after a break, whether a few hours to a few days, I always end up repeating the first turns because there's always something I'd forget.

Oh yeah, I was going to send all these priests to this province because it's about to revolt. Oh yeah, I needed to move some garrisons from these cities to a newly conquered one. Oh, that's what that ship is for and why these armies are moving here...