Maths: Algebra I, Honors Geometry, Honors Algebra II, Honors Pre-calc, AP Calculus AB (And if you can Calculus BC...I never got this far)
English: All Honors English 9-11, AP English 12 (Lit. & Comp for me)
Sciences: Biology, Physics, Chemistry (Shoot for APs or Honors...I only took AP Chem)
Social Sciences: 1 year of World History, 1 Year of AP US History, 1 year of AP Gov't, maybe some economics or geography (definitely not required)
Languages: You can obviously take 4 years. I'd say three is sufficient. I got in with just two years of spanish, but I come from a spanish-speaking family, so I was already fluent in it.
Take smart electives that you like and go to the highest level. If you're interested in art, go to art 4. If you're interested in ceramics, take ceramics. Doesn't matter. I took Bible & theology electives, a drama class, and health education electives because that's what interested me and I was fine.
Obviously, strive for the best grades in all classes. If you have to pick and choose, get the As in your sciences, maths, and english classes.