Brandon, good luck to you at SERE school. I went through in February of 1992, so I'm not sure any of my advice would still be relevant. I will tell you that you will retain more from this school then you can possibly imagine and it will benefit you all of your life. Maintain a good attitude, appreciate the spirit and intent behind the school, and be honorable and engaged during the whole process.
I was very impressed with the effort put forth by the school and the instructors and since my chosen profession was going to be helicopter rescue, I was blessed with receiving special attention, if you know what I mean, and at the time that wasn't so cool, but I have always appreciated and and respected it as I moved on through my career.
I think your best advice will come from your senior class, who will be just finishing as you arrive. Don't be swayed by the scare tactics you usually get from a class that just finished what you are about to endure, just look at them and rightfully assume if they can do it...so can you. There will always be some decent folks who tell you the right things and what worked or didn't work for them.
The actual time in the field is designed to be tough, and it is, but that is the secret of getting you to retain so much of the class. Captain Scott O'grady who also went through Spokane, credits the school with his survival when he was shot down over Bosnia.
Anyway, I know a fella in your position wants more detail but you will soon learn that some of those secrets are meant to stay secrets. I will tell you that you will see a few people wash out, that always happens and I've always believed those things happen for a reason, and a good reason at that. It really is a mind game, so try to remember that no matter how sleep deprived, hungry, and tired you are.
The resistance portion of the training is the hardest part for a lot of people, but I had trouble being hungry out in the survival portion. I didn't like not having a food supply so take advantage of everything you can even if you are tired and cold. I caught 6-squirrels while I was there using the methods they taught me, and I ate every part of those little squirrels and it helped my attitude immensely. Don't get me wrong, resistance is not a lot of fun, especially if you have to take the advanced course. Military careers are a series of stepping stones, so just get through this step and onto the next.
ITS WORTH IT!