Valid questions you ask. As a recent UPT grad here are my thoughts:
Be a bro- Don't try and shine your own ass. If you can help a classmate out with some random GK type stuff or how to fly formation or how to properly open a beer with your teeth (valuable lesson I learned), do it. The next time you have a question your bros should pay it back. There might be classmates that wait for the opportune moments to "be a bro" while commanders are watching, but commanders can see through that crap.
Have goals- more like have realistic goals. Don't show up day 1 and say "I'm here to fly an F-XX." That may be your personal goal (and thats all good) but know your place. IPs might take offense if you show up acting like billy badass (probably because they wanted fighters and it wasn't in the stars for them). I would set goals for each phase and it kept me focused (Eg. 100% on Tests, T-1/-38 at Track select, Fighter/Bomber/etc on assignment night).
Study all the time- Ok not ALL the time but for me, whether i knew the info or not I was engaged Sunday afternoon through Friday afternoon. Study every manual or T.O. you can and when you know it forward and backward, reread it. Just do anything to stay engaged. Now from Friday afternoon until Sunday after church I never touched a book (just to keep me sane).
I hope this might shed some light on the subject, those are just a couple of things that helped me.