I never eat the last bite on my plate. When I was small, my mother would make me sit at the dinner table until I ate every last bite. I was a stubborn child, and refused to do so...ever! No matter where I am, I leave one bite, especially if I'm eating a sandwich. I never eat the last bite of a sandwich.

I also have a habit of unconsciously typing out words I hear with my fingers. My mother used to do it, so it may be something I picked up from her, but I have friends who worked in offices for years who so it too. I've had people ask me what I'm doing, and they laugh when I tell them I'm typing out what they say. Actually, it's just a couple of words. My mind will pick up a certain word and I'll just start typing it over and over. I guess it's sort of an OCD thing.

A good compulsion I have is to propagate plants to give away. I have grown and given away literally thousands of plants, and it makes me so happy to do it. I can't stop, even if I wanted to. If I trim a bush, I stick half the trimmings to root. If a plant has seeds on it, I save them. I'm a compulsive propagator, but considering I'm really doing it for other people, I don't feel like it's a compulsion I should stop.

Now if I could only get the compulsion to clean, I'd be great. ;)