I came upon this blog post some time ago and decided to try it: https://wp.josh.com/2023/11/21/how-to-remember-everything-you-have-ever-said-or-heard-forever-starting-tomorrow-for-60/

The tldr is: buy a cheap Chinese voice recorder on amazon and just turn it on in the morning and charge it while you sleep. It'll keep a record of everything you say and hear that you can always access. The pain of digging through mostly useless recordings will get easier as AI improves and it becomes possible to simply ask your AI assistant to "play back my date with Stacey".

I don't have any fancy set up yet. Just copy over the mp3's to an encrypted hard drive every couple of days. But it's already become pretty useful. For example, I was able to analyze in detail a date I had a week ago and figure out where I misread interest from the girl. I was also able to save myself from the embarrassment of forgetting a girl's name that I'd picked up at the grocery store.

There may be some ethical concerns about recording people secretly. But the way I see it is, everyone is doing that to you already. The only difference is that they don't have easy access to the recordings they make (access is restricted to the NSA, CIA, and others..). So if people really cared, they wouldn't use smart phones or home assistants.