I'm currently awaiting assessment and have been thinking about the things I do.
I'm sat here constantly rubbing my foot against the sofa in a back and forth motion. I used to think this was only when I'm tired but it's not, it's all the time.
As a child I used to twitch my nose like a rabbit and had to force myself to give it up but I still do it.
I fiddle with things constantly. During stressful phone calls for example I will repeatedly remove the rubber from my pencil by twisting it then twist it back in over and over.
My feet are never still. If I can't rub my foot against something I'll be wriggling my toes.
There are probably others but I can't think of them.