Since reading "The Making of Prince of Persia" (highly recommend) I've tried to journal – roughly once a day – just a way to recount my day to day in the future when I don't remember the smaller details.
Also in a weird way my BeReal has become a bit of a photo diary – I use it pretty consistently on a daily basis. It's crazy how much looking back at a single photo can jog your memory on what you did that day.