Well, what do you want to major in? What’s your passion? If you want to go into engineering, try and secure an internship or research position at a local university. If you love the trumpet, try to get to the level of a state symphony or otherwise recognized position. You have a lot of activities, but not too much depth in a single area. I think that’s where you can improve the most.
Best of luck to you! 
Chance me back?
http://talk.collegeconfidential.com/what-my-chances/1966406-chance-me-upenn-ed-yale-brown-princeton-etc-will-chance-back-p1.html