I totally understand the concern about organization paralysis, but the point is to keep it simple, focused, and relaxed. By writing things and ideas down in an organized way I don't have to track it in my head, and I can get back to what's important. Or at least procrastinate on something useful. I suppose it looks complicated from the outside, but has really only grown slowly over a decade.

Also: I have most bills on autopay, and transactions created 90d in advance in GNUCash. I do also have piles of mail in the form of a filing cabinet and labeled folders. I've actually been experimenting with letting the mail pile up in an inbox and filing it away once a month just to prove to myself the system works enough that I don't have to monitor it daily.