useful info
applied for the Air Force ROTC earlier this year to get into college next year. tip: start early, don't wait because there's limited space and the selections start early.
aptitude test : you'll want to practice for it: make sure you master the basic math elements but without a calculator (multiplying, dividing and get used to algebra too), also, visual-spatial exercises are useful too. for the literacy section, i guess it's something you've got to be good at, but for me they just shot me some random words and i had to know their definition
interview they'll sit you down at a desk and ask you basic questions. they'll also check if you know what you're getting into: know your stuff about the program(s) you selected. Also, this is the time to talk about your leadership info: anything pertaining to team sports or organized group activities. this is where i failed, i don't have much group sports experience, i ski too much.
now all of this concerned the Canadian Forces but i suspect it is similar for the American Forces
with this info/strategy, i very nearly got into the Pilot ROTC program but got 58 out of a minimum 60 on the interview to be elligible; i needed more leadership experience. having good grades is a definite + also
good luck man, hope you make it in! if not, just work on what you had to improve and reapply later; that's what I'm doing. also, if you plan on reapplying, joining the Reserves will also help you. this is the path I'm taking. best of luck