Get out there, volunteer for leadership opportunities, and above all else do NOT screw up your gpa this upcoming fall.
Too many cadets at my det overloaded their schedules with super tough, core tech courses in the spring of their 100 year or in the fall of their 200 year and that killed their chances of getting EAs. If you're thinking "Hey, I should take phys II, calc III, circuits, fluid mechanics, and thermodynamics next semester", think again. Don't take only fluff classes, but be sure to balance it out so you won't absolutely murder your gpa in one semester. For some reason a lot of cadets I know decided to load up at the beginning of their 200 year, by the end of it all they could say was "If only I hadn't taken XX classes last semester...". Don't do that to yourself. If you know you'll be taking 2-3 really hard classes, take at least 2 SS or humanities classes that you know you'll get A's in to balance it out if you do poorly in some of the harder classes.
If you have to make the choice of where to put the bulk of your energy, chose your schoolwork. It comes first. We had a cadet who was in every club/activity AFROTC had (Arnold Air, Silver wings, honor guard), was there for everything, volunteered to help out around the det all the time. But after all that this cadet still didn't get picked up because they were non-tech with a 2.5. The cadet we had that was hardly ever around other than for LLAB with a 4.0 got an EA. Grades will win out every time, since usually grade are also a large part of your CC ranking, which can be a good thing or bad thing.
Another thing is don't bomb your AFOQT, you only get to take it twice so try to do well the first time. I couldn't believe it when I talked to two cadets who failed it...twice! Failing once is pretty bad and really just means you did absolutely zero prep for it since you only need a 15 in Verbal and 10 in Quantitative, but failing it twice is just unacceptable. Those two are hoping for a waiver so they can continue, but they only give out those if you were ill at the time of the test. Command takes the highest of your SAT,ACT, and AFOQT, but you still need to pass it to go to field training.