I could write an essay on all my stims, but for the sake of brevity..
leg-bobbing, pacing, rocking, playing with my hair, tapping, and playing with random objects (tennis balls, pens, paper clips, etc...). I'll sometimes slap my leg or my shoulder repeatedly with my hand or some object. I also talk to myself or hum: This one I have to be careful with when I'm away from home; I went to family get-togehter this weekend and someone caught me talking to myself--they asked if I was talking to the cat.
AspieOtaku wrote:
Pacing, hand flapping, toe walking, spinning, talking to myself, and last but not least running up the stairs on all fours.
I used to go up the stairs on all fours all the time.

I eventually managed to break that habit, but I wonder if it might be safer for me to do so given how often I stumble when going upstairs. I used to spin, too, but I stopped doing that when we moved to a smaller place and didn't have room to go in circles any more.