I have a slide-open phone so I just sit there sliding it open and shut constantly making a rapid *shshshsuck* *shshshsuck* *shshshsuck* *shshshsuck* sound.

I crack the bones of pretty much every joint I can crack...
Neck, Fingers, Toes, Ankles, Elbows, Back, nose on occasion... Jaw...

Otherwise I just find myself clicking the same bookmarks over and over even though I had just been to the page.

-I have the usual habit of fidgeting/wiggling and playing with random objects that everyone seems to have.
-When I'm concentrating, I bite, stroke, or pinch my bottom lip, usually until it hurts.
-I have a habit of running my nails across or digging them into my skin... Not enough to leave marks, just enough to hurt slightly.  I really don't understand why I do it.
-I shake everything I drink before pouring it, unless it's carbonated.  Including water.
-When I hold hands with someone, I always make sure my hand is behind theirs, or underneath if we're sitting. 
-Whenever I walk with one person, I stay behind and slightly to their right.  If I'm with more than one person, I usually stay behind them, but in the middle (basically I make them my meat shields).
-Everything I carry is usually on my right.  Purse on my right shoulder, objects in my right hand.  But I usually shift items to my left hand to use them, such as keys, and my cell phone is always in my left front pocket.
-I neatly stack or sort things, but only outside my own home.  If I visit a friend and see a stack of DVDs or paper or something that's tilted, I always have to fix it. 

For me, I'll end up just dazing off into the distance as I start to think about something completely irrelevant to anything I had been doing. Then I'll snap back to what I was doing and have no idea what it was I was just thinking about. Other than that, just the normal stuff of tapping my toes, rubbing my eyes, and holding a glass of water in front of my mouth. I won't drink anything from the cup, I'll just leave it there and breathe into it. It makes a nifty sound.

9. Sometimes on long car trips I'll imagine a little guy running along side the car jumping over things. (mostly it's mario)

I've got to try that. xD

I have a MASSIVE nervous tick. Like, my entire fucking face twitches. Most of the time I don't notice it, unless someone points it out to me. However, when I'm really tired, it becomes a lot worse, and I become consciously aware of it.

i used to have this a bit when i was a kid!  how often does yours happen?

Sometimes when I'm listening to music I'll randomly start saying the alphabet in tune to the song
or
I'll start making up my own words related to whatever I'm doing in tune to the song.

I cram my oral hole with burgers. I do not know where the burgers come from. I reach, grab, and there's a burger. Instinct maybe.

I scratch the pads of my thumbs with my fingernails sometimes. Actually it's probably all the time because I don't know I'm doing it. But I figured it out one day when I broke skin on one thumb and it hurt. "What in the tarnation?" I said, very animated. (ture story)

When Im on the top deck of a bus, sitting right at the front, I look out the front window and down at the line markings on the road and imagine myself running along the road at the pace of the bus, with huge strides. My feet land in between the road markings with each stride. I run with the poise of a cactuar.

I tap my fingers onto the keyboard with enough force to make a noise but not enough force to constitute a keypress. It's a fine but ultimately useless art.

I tap my feet, bite my fingers(nails), run my fingers through my hair, stroke the underside of my chin with a single finger while my left eyebrow is raised (my arrogant/intrigued expresion), crack my fingers, make silly clicking noises with my mouth... tick most of the usual suspects here.

I use my hands to tap a beat out onto my chest. I tap my belly for the bass, even though theres practically no difference in the sound that's produced.

When I'm buzzing I chew straws, then straighten them out again with my mouth and blow'n'suck through them, then chew them all over again.

Some of my friends get a bit put off because when I'm having a serious conversation I pace around.

Looking at every car window I walk pass.

I don't know why I do this.