Cheating?

Nothing sexy, nothing scandalous. Here it is:

I am a compulsive to-do list writer. Any time I have a few minutes to myself or I'm bored, I will pick up pen and paper and begin to commit myself to a list of items that I must accomplish and that will make me feel like a productive member of society (my society, Lillyville, population: 1).

So here's my question: Do you ever finish something, only to refer back to your to-do list and find out that it's NOT ON THERE? Then do you write it in and subsequently cross it out?

Don't accuse me. I'm just asking.