How about 10 bits?
1. If you were a civil pilot before, don't try to tell the military instructors that the military way of flying is screwed up. Just do it "their" way.
2. Make a real effort to get to know everyone in your class and help each other get through. You're probably going to see a 30% wash-out rate, so not everyone's going to make it, but try to help them anyway if you're able.
3. You're not there only as a pilot. You're a military officer too, so act and think like a leader . . . not some kid learning to fly cool airplanes. Have fun but don't act like an idiot at the bar. Take care of your classmates and friends that ARE acting like idiots at the bar.
4. Treat enlisted personnel with respect and courtesy, but not undue familiarity. Expect and demand respect and military courtesy from enlisted personnel.
5. If you feel airsick early on, tell you're instructor. 99% of the time you're going to get over it, but jet aerobatics wearing a mask and helmet can really get to some people. If you puke, do it in a bag and not in your mask or on yourself. If you puke all over the cockpit, it's not the crew chief's job to clean it up . . . . it's your job.
6. Academics are pretty easy. Sims can be deceptively tough. Flying is fun, but serious biz too. Be prepared EVERYDAY. I don't know if they still do it, but if, at the end of the course, they offer to let you take the FAA military competency test and get your FAA commercial license, (MEL Limited to CL thrust), do it. Don't be stupid or lazy. It's a freebie that you'll appreciate later on.
7. Sooner or later you're going to bust a ride. It's not the end as long as you don't make a habit of it. Get over it and drive on.
8. Don't get uptight about final assignments at the end. I got my dead-last choice out of UPT and it was the best flying assignment I had in 20 years of military flying.
9. You're getting a chance at the best training in the world. There are literally thousands of guys that would gladly trade places with you in a heartbeat. Make the most of it.
10. You may think that being a military pilot is very cool. That said, you should never act like it is, nor should you EVER brag about it. You don't have to. The wings that will be on your chest speak for themselves.