If I’m ever out somewhere and suddenly remember “Oh, crap. I mustn’t forget to put that [insert name of the thingy that I have to remember not to forget to take to wherever I’m going tomorrow] into my bag when I get back home.”, but I know I’m going to forget again before I get home, I simply rotate my watch round my wrist, so it’s now face down. I don’t move it back until I have done whatever I have to remember to do. Works EVERY time.
What do you do to remember stuff like that?