Occasionally, though, when I want to be really sure that I don't drop it, or move it to the back of the ToDo list, I'll mark the note as "unread" in my email program. This creates sufficient mental anguish for me that I take care of the email at the very next opportunity.
Other things I do that readers might find helpful:
"Worst First" - that's M's phrase. Obviously, it refers to doing those tasks we dread most first, thereby getting them out of the way. She does not always follow this advice. (This was also my father's advice to me. I never followed it when he told me, but now that I'm hearing it from my 8 year old, I can't ignore it.)
Hmmm - that's the extent of my advice. I'll post more later, if I can actually think of any.