can't stop this shame

I am starting to realise more and more is that we need to become aware of the root cause, this isn't just a superficial problem and its so difficult to fight because its being triggered by something deep inside of us! I dont know about you but my picking is most definitely worse around times of axiety or stress and I find my whole body erupts with anxiety, I start falling back into tons of obsessive behaviors, biting my cheeks, picking my face etc etc....Recently after seeing this board and sharing my problem with others i've been researching ways that i can try to stop - most recently I have tried putting signs on the mirror, which do nothing to stop the urge. I really feel that its a matter of calming down inside and taking a moment to reflect rather than to act on impulse and feed to compulsion to pick. Easy to say but I haven't quite figured out how to do this yet :-s !! I was just watching this video on youtube http://www.youtube.com/watch?v=yoxpFK9CmTQ although it seems a bit farfetched to me that this could have any effect, but I am literally willing to try anything! I like the fact that tapping your skin has the same sort of repetitive motion as other obsessive compulsions and am thinking of trying this when I have the urge to pick and also in the evenings. I have a problem with grinding my teeth which i have managed to resolve by taking 5 minutes to do exercises and relax - I'm hoping it might work in a similar way.