www.hypnosisdirect.com I've used it to stop nail biting and it does actually work. For £5 a download it's definately worth a crack. YOu have to be in the right mindset for it. first time I did it I couldn't stop giggling I listened to it for 5 nights in a row and it stopped me. I have to listen to it every now and again if I start but it keeps on top of it.

It also covers self confidence as part of the treatment and bizarrely I found myself a lot more confident as a sideeffect

They do them for all sorts of stuff.