I've been doing this for myself for a couple years now with a little service I wrote that just sends me an email each day that I reply to. It's archived in my e

I've been doing this for myself for a couple years now with a little service I wrote that just sends me an email each day that I reply to. It's archived in my email history and in a simple, searchable web UI. It's been super useful for figuring out when I did something a few years ago, medical notes, etc.