Yeah, not a good idea to pull your hair out. It's a nervous habit, of course. How about chewing on your fingernails? Or restyling your hair (ponytail, up, down, on one side, etc) without pulling it out? . . Otherwise, you could see your doctor about getting an antidespressant. I realize you're not depressed, but antidepressents help all sorts of things, and that's one of them. Talk to your doctor about it.