Cognitive Behavioural Therapy is very common Jude and works very well, I believe. Paul McKenna talks a lot about it in his books, and it really helped me when changing my eating habits - actually I have slipped back recently in naughty habits to might read it again - I also have a tape which helped.
Sort of like when you fancy chips, you imagine that chips taste like something revolting that you hate - like tripe and eventually you associate chips with tripe and you can't eat them!!
Shaney, tried the coat on over a T shirt and a M&S fleece, and then over a chunky jumper and it was fine.