This article on the blog of a psychologist's website (with a lot of experience with youth and adolescents) is very useful for treating cases of OCD, or at least reducing the effects of it as the person deals with it in therapy.
I'm not sure if I'm allowed to post the link, but here it is. I hope it can help anyone out there who is having to deal with this issue and I wish them all the best of luck.
Here it is:
obsessivedisorder.net/index.php/blog/item/88-ten-things-which-you-can-do-to-overcome-an-obsessive-disorder