My quick tips for success at UPT:
1) Be a team player. You are not graduating by yourself, you are graduating a UPT class. Help others out in study sessions, don't be afraid of asking for help yourself. The big "competition" that students feel is largely self generated, the IPs know who is doing good and who isn't.
2) Have a good attitude. Recognize that the AF wants you to learn to fly THEIR way. If they wanted pilots trained like the academies or even FBOs train them, they would contract out this whole process. Guess what, they don't. Be a sponge, forget what you think you already know. In fact if you have any significant prior flight experience, downplay it as much as possible. Better to have an IP expect little out of you and you demonstrate a lot vs. him expecting a lot out of you and you showing him little.
3) Party hard, but be smart about it. Have fun on Fri or Sat nite with your class, but start digging back in on Sunday to be ready for Monday.
4) Be prepared for every flight/sim you are eligible for. There may be several things the scheduler can throw you up on short notice, be prepared. IPs will work a long way with a weak stud who is prepared and is giving 110%. They are not so keen on studs who think they don't need to prepare and come into a ride cold with the attitude, "Demo that for me before I try one so I can see what the entry speed is, I didn't really study up on this."
5) Finally, realize that networking works in the AF too. Don't go out of your way to piss off fellow students or IPs, you may be working for them someday, or need a favor or contact somewhere down the road.