I have had it pointed out to me that when I'm particularly anxious about something I'll bite my nails and pick at my lips. I've been so anxious before that I've picked my lips til they bled. Its not a good thing and doesn't look particularly attractive either.
There are different coping skills for everyone the key is to just find yours. And to remember that just because you have anxiety or anything else you are still a great person with so much to offer the world.