I would recommend www.sparkteens.com
It's like sparkpeople.com for youngins (nutrition tracker, message boards, teams, etc)
but you can stick around here, trust me, you'll learn a thing or two from people who have been doing this the right way for a long time.
Having a few years under your belt is good for some things.
"Success is not final, failure is not fatal, it's the courage to continue that counts." --Winston Churchill\
Check out my weight loss blog!: www.beyondwillpower.blogspot.com