Health and personal issues
teenshealth has honest, accurate information about health, relationships, and
abovetheinfluence.com offers a forum for teens to share their ideas for leading substance-free lives.
http://www.recoveryconnection.org/ Although this website's first goal appears to be to connect people with detox facilities and treatment, it also has extensive information on all aspects of addiction and substance abuse and treatment.
activeminds.org provides a get-help mental health guide for teens and young adults.