I often do the same thing KYS does...leave messages for myself on the answering machine. I'll do the opposite if I'm inside, and heading out, and leave myself cell phone reminders. I also take advantage of the large bathroom mirror and tape notes of things I have to do. Works for me as I can't avoid that mirror. Kitchen cabinet doors also are good places to tape notes. Problem is some days are so crazy I can't remember to write the note!