I go to a lot of meetings.
I take a lot of notes.
I just started typing up my notes as soon after the meeting as I can. I then email them to the parties that were at the meeting and to myself.
Amazing how often those notes come in handy.
they are a concrete form of what I heard in that meeting
they help others that were in the meeting to understand things the way I saw them
if I forget, much easier to find the typed notes in my email than trying to figure out what the scribble in my notebook says.
Simple to do, yet just as simple not to do.