I do write notes to myself to remind myself of what I need to do the next day. These are sometimes quite cryptic when I read them them. I was certain that "nec-funu-wat" would make perfect sense the following day but I still haven't deciphered it. I also write notes to myself about _amazing_ ideas. These frequently, although not always, cause me to smack my forehead the next morning.
What would I email myself instead of mostly practical notes? Questions to ask that stranger, my future self. Are you avoiding something that's causing emotional distress, but you need to do anyways? Did you eat/sleep/exercise/rest enough? Are you balanced emotionally? Are you getting what you need out of life today? How did your life philosophy affect what you did today? Did you make time to chat with folks? Do you need a hug? Did you pet the dog? Madu nannda wubba? Tueree!!