Good on you for trying different things out, and looking at the holistic approach.
Alternativista mentioned stress reduction - have you looked any techniques for doing that? Things like EFT really helped me. I know The Love Vitamin has great articles on it, and I'm posting some on my blog as well.
I noticed that my acne flared up alot when big life changes happened, like moving, getting a new job, and new life choices. You mentioned you had a serious breakout after in your senior year summer - were there any big life changes happening that could have been challenging?
I think you are right, there have been some major changes in my life when I have had these breakouts. Brothers sudden passing, switching colleges, and now breakup with my girlfriend. I just downloaded your PDF and will give it a try. Thanks!