I crinkle and completely tear up any paper or paper like material in my pocket. I've almost done this to money a few times o_o
I have Trichtillomania, meaning, I pull out my hair without realizing it when I'm stressed out or very relaxed. I've gotten small bald spots on my head from it before.
According to my friends, my laugh is quite maniacal 0__o
I talk too loudly.
I pick at my fingernails, sometimes causing them to bleed.
I chew the ends of my hair when it's long enough >_<
I have OCD, you can only imagine all the weird, pointless little habits I have XD