Rocking back and forth
I rock back and forth constantly, unable to sit still. Something about it is very comforting and used to be a bit of a coping method when I was extremely anxious or upset. Now I just do it all the time, including as I type this post. I do it when I'm wide awake and when I'm about to fall asleep (although it's slower in that situation). As long as I'm sitting, I'll be rocking.