Am I on the right track to Princeton? Chance me!?

Everyone applying to Harvard has the highest grades in the hardest classes and very high test scores, and they took fewer than 5% of applicants this year. You need all that, and you need a lot more to have a decent chance. Weighted GPAs don't matter; every high school has their own weighting system. Colleges ask for unweighted. Right now, you're an average applicant at best. You need to find a way to get involved with your future major now if you want to have a shot at a great school. You also need to convince them that they're the best place for you, and that's not obvious from this. What can Harvard get you that no one else can, beside the name?