Hey, I'm not one to know much about addiction, but I slip up with other things...and when I'm feeling "healthy", I use my anger, my "I'm really pissed at myself" to motivate me into doing the responsibile thing.
Start over again that's the great part. If one pill isn't enough to bother with, then get really mad at 2 pills or 3 pills for coming into your life, because they aren't worth bothering about either. You deserve to be free of them!
You know what you need to do when temtation hits, you've done it before. I believe you will do it again.