This is my universal system. It doesn’t even need to directly correlate with the reminder, since most of the time I just need to be reminded that I need to remember something.

For example, I’ll leave a chair in the middle of the kitchen so I remember to do something when I get home. The second I see it I remember whatever it is I need to do. I’ll leave it there until it annoys me into doing what it was I needed to do. Very effective for my ADD/OCD combo.