This matches the spirit of Getting Things Done's "Inbox" quite well. The goal is to minimize friction for recording thoughts/ideas/todos that come into your head. You write them down and into the Inbox they go, to be sorted/dealt with at some later time.
I write notes throughout the day. Hardly ever search back in it. It's just to let me stop thinking about thing X while I'm working on thing Y. If X is important it'll come up again or show up in a ticket somewhere.
