lake Become a stronger catcher.?

Right now I am 5'10 160, and a 15 year old freshman in high school. I love playing baseball, though it is my second sport behind hockey. I play straight up the middle. catcher, pitcher, shortstop, second base. When pitching i throw around 83-84, and back it up with a 70mph changeup, while mixing in a curve occionally. I love playing catcher and short, and i throw out 45% of runners from behind the plate. I was wondering what some good weight routines were to make sure that i am prepared to tryout for varsity, or at least give it a strong shot. Just give me some tips on how to become better, all around.. Also my speed is not very good, its average, but i'd love to become a five tool player instead of like a four. thanks.there