Very true, I was great on all those standardized these that you have to take while in school. But when it came to the actually course work, I didn't put in as much effort as I should of and nearly didn't graduate high school because I started to give up. I only cared about classes that had some meaning to me, such as a marine biology class or any science class for that matter.
I would say both. Mikes post was a big help, along with the others that said things. To know that I am not alone and not the only one that is/has gone through something like this, and that others came out fine in the long run.
I know that I want to do big things in my life and have big goals. So I need to stop looking around and seeing how bad things are now, when really they could be worse, and look towards the future and start working towards my goals and get on with life.