Sparkpeople.com!!!!!!!!!!!!
I can't say enough good things about this site!! It was a load of useful articles, video tutorials on how to do exercises, nutrition and exercise tracker, community boards with teams of people trying to all reach the same goal, and it can even make a meal plan for you complete with a grocery list!!!
I'm too lazy to use the meal plan but just by tracking my calories using this site I lost 10 pounds in 2 months!!!!
Oh yeah and of course it's free otherwise I wouldn't be talking about it!!