I'm another habitual leg "bouncer." I've noticed that if I get real interested in something, sometimes I stop, but then sometimes I start doing it real furiously.
Sometimes instead I "snap" my big toes against the second ones, or shake a foot.
I recently bought a steel ring off eBay with a spinning band around the middle with stars on it. Now I can spin it at work. Whee.
When I was very young, and my brain was too busy to let me fall asleep, I would turn my head left and right while lying on my back (shake my head "no") a hundred times (I would count). This seemed to help. I stopped doing this at age 6 or 7. I rarely have problems sleeping now.
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It is an act of faith to assert that our thoughts have any relation to reality at all. - G. K. Chesterton
http://jellynail.vox.com/