Take a look at EFT which is a great tool for working with addictions and lots of other emotional issues. I saw this was mention before, but this tool is so powerful and simple I’ve just had to post it again, - it should be implemented in grade school!
I urge you to take a serious look. It’s very simple and quick to apply on small or big issues. I lost my extreme spider phobia in 10min (no kidding) and I use it for many small things at well, - it’s really amazing. For instance if I get a bit sad or angry over a thing, I just apply EFT for 10sec and my bad feelings just fades away like magic. You may not implement EFT as a new behaviour tool, but you can use EFT when you get the feeling that brings you into acting out your addiction.
http://www.emofree.com/addiction.htm

You find the free manual here: http://www.emofree.com/freestuff.htm