Adding something to a TODO list makes it generally less likely that I'll do it.
If I add it to the list, then I'm far less likely to just remember it, because it has less permanence. So whether I'm later reminded, depends on whether I remember to check the list.
So for each case, I have to evaluate which of those two is more likely.
Then for anything I'm reasonably confident of remembering -- it's more likely to happen if I don't create a reminder for it.
