Secret Shame - http://www.selfharm.net/injury.html
has a lot of good self help and other info
Lysamena Project on Self-Injury - http://www.self-injury.org/index.html
This is Christian based, but still has a lot of good info for anyone. I like page on Affirmations. I never really do well with affirmations, but some of the ones on this website really helped me.