When I get my cereal in the morning, I pour it into the bowl and then decide that I have about 5 or 6 pieces too many and put them back in the bag. I also can't eat just one type of cereal, gotta mix at least three or four together. I barely get any milk on my spoon each bite so that there's a lot leftover, so I can put new cereal in and have a second bowl with the same milk.
I'm completely right handed, but decided to use my left hand for mousing all day at my desk at work. I'm surprisingly good at it now after doing it for a year.
I also hate sitting. I stand next to the couch to play games, I stand next to the chairs in a doctor's waiting room, I'll voluntarily stand on the bus when there's plenty of seats, etc.
I'm sure there's more.
One thing I don't ever do is talk to myself, though that's more because I have a constant 24/7 sore throat and talking hurts.