I'll throw my 2 cents out there...
I had the pleasure to go through pilot training twice...once with the Army and once with the AF. Both programs are similar in overall mindset (as opposed to Navy training) in that they run heavy on a timeline. I'm sure you've read often that a good attitude will lead to good things. That is true, and the best thing you can do is simply try your best, have a good attitude and ask questions. Don't be afraid to do that last thing...your IP won't think you're stupid for asking questions, in fact they'll be glad you care enough to ask about the things you aren't sure about. Do NOT sweat whether you're going to make it. Worrying will only degrade your performance, and just believe that if it's meant to be, it's meant to be. Focus on the phase of training you are in, don't get caught up worrying about the next year's worth of tasks or else you'll feel overwhelmed. Just take it one day at a time, and before you know it you'll be finishing Phase I, Phase II and Phase III just like that.
Don't get caught up in class rankings, who's better than who, etc. Just realize that everyone who graduates gets to wear the same wings. Don't show up wanting to only fly one type of airplane. Show up prepared to fly ANY airplane. If you have that attitude, you'll stress less and you'll be happier with the outcome. Have a few choices from each track as your goal. Nothing like watching the "fighter-or-bust" types practically cry on track select night because they got a T-1. Me personally...I liked the A-10, C-17 and C-130...those were my top picks in each track (I had already flown helos so I didn't necessarily have a top pick for that track). Either way, whatever track I went, I had a goal to work towards. In the end, I put T-38s third, only because I had already flown helicopters and thus put them last. At some point in Phase II, you'll decide for yourself if you'd rather be a fighter guy or a heavy guy...there were several that arrived at the start wanting to fly Vipers, Eagles, etc, and by track select were saying "screw that stuff" and opted for heavies.
Bottom line...arrive with a good attitude and ready to fly any aircraft the USAF assigns you to, even if it's an E-3. I'd rather fly AWACS than sit at a desk with the other shoe clerks, trust me on that. Having an open mind and a good attitude will reduce your stress level and you'll actually be able to ENJOY pilot training! It's a fun, yet very busy year. Nothing they teach is rocket science, but there's a lot of stuff to absorb. Finally, just accept that a small number of people aren't going to be cut out to do it, and if you're one of them, then that's just the way it is. Give it 100% and if they wash you out, well at least you can say you tried your best. If you have that mindset, you won't stress every time you fly or do a stand up. Anyways, hope this helps some of you!