I want to get into Brown University...Help!?

Hi, I'm a sopre in high school and I really want to go to Brown. My grades are good (mostly low to mid 90's). I took the full PSAT and did really bad. I basically went into the exam not caring and got a 1450, yeah me! But that grade reflects me skipping every math problem that included a shape or figure lol..I'm going to focus more on my SAT's, especially in math. However, I got a 10/12 on my essay which i think is pretty good, i'm not quite sure though. I am apart of Spanish club, I do many hours of community service, and i horse back ride. I am also joining the golf team this spring to show more school spirit/"well rounded"-ness. I really want to know if i am on the right road to even considering Brown. Please be honest..thanks.