I was just browsing on stoppickingonme.com and theres a version of the 12 step program adapted for picking. It's in the recovery section and it's an interesting read. In particular I identified with the following:
"Once of the best slogans that A.A. offers is HALT - Don’t ever let yourself get too
Hungry, Angry, Lonely, Tired,
You may find this to be pretty solid advice for your picking obsession as well… "
This really hit home with me as I think I'm almost always feeling one of these things when i pick! And I think they are also the most likely causes of other behaviours I don't like in myself eg being argumentative or short with others.