Yeah, I've messed around with Method of Loci off and on over the years, but it hasn't done much for me. Probably I'd just need to put the effort in to it, and I haven't. My natural tendency has been a grab bag of sorts; if I want to recall something, I think about a category -- "people", "projects", "trivia", etc. -- to kind of prime my brain in some way I don't really understand, and then it just pukes out a bunch of stuff until the thing I'm looking for pops up. Like, if I'm trying to remember an actor's name, it goes, "face -> action movie -> movie box was dark blue at night -> heat -> Val Kilmer". It's usually pretty quick.

You're right though, brains are pretty fallible. If something's really really really important, I do have backups. Usually email, or text, or paper.

...but, honestly? I'm scared to death of old age. It scares the piss out of me. One of the things about it that really gets to me is the idea that I might be 90 one day and not recognize people I care about, or remember anything about myself, or have any idea what's going on around me. The smartest elderly people I know are all very mentally active, and always have been, so even though there isn't good scientific evidence for the prevention of alzheimer's through puzzles and brain teasers and the like, I do it anyway.