http://www.eating-disorder.com Click on "Mirror-mirror" (the Canadian site) or "Something Fishy" (the U.S. site) to find out more about eating disorders and how to get help for a friend or yourself.
http://www.teenwire.com The private place where teens can get information and news about teen sexuality, sexual health, relationships, and other issues facing teens today. Developed by Planned Parenthood.
http://www.wingofmadness.com A depression guide for teenagers. Covers such things as symptoms of depression, how to tell your parents, and teen suicide.