Funny, I was just thinking today about what I'd tell someone of high-school age if they were asking me about this. Basically, it sounds like grades are the biggest thing you need to work on. Think of it like an investment plan, the sooner you start paying in and the more you pay early on, the more likely it is to come through when you go to cash in. Some hard work now will pay big dividends in college and later on. I don't know if the Academy is out of the picture right now, but unless you're already too far behind academically or otherwise not eligible, I'd say to shoot for that. Maybe you don't have the best chance, but it's something to reach for. Beyond that, there's ROTC, as mentioned. Also, start thinking now about what you want to get a degree in. I went back and forth for a couple years and in retrospect was probably somewhat lucky to come through with a Math degree in four years and a good GPA. Math, Physics, and Engineering are the ones they like to see most, from what I hear, but don't lock yourself into something that you don't feel fits you. Finally, I'd recommend that you talk to a recruiter, but if you're intent on flying don't even think of going to an enlisted recruiter. They don't generally know much of anything about officer programs, their focus is filling their own quotas. They will tell you about how it's easy to go from enlisted to officer and how that's actually a better route; they aren't there to help you with your commissioned aspirations, and any help you get from them towards that is largely generosity on their part. If you can sit down and spend some time with an officer recruiter you should be able to come away with what you need to start planning.
By the way, it's good to see someone your age setting goals and thinking ahead, when I TA'd a while back I saw a lot of people who had no idea where they were headed, and they were already in college. But then I didn't decide that wanted to fly Navy until after college either, so I shouldn't speak too loudly :icon_wink
