Have an open mind about everything and ask TONS of questions to your squad leader and the rising firsties in charge. Also, please don't go looking to impress people! Everyone at NASS is great, you don't have to prove it. From my experience at NASS, no one enjoyed the kids who tried to hard or were really out of shape. Also, do everything that is offered! There was a guy in my platoon who opted out of a lot of things and that just came off as "I don't care about this,". Overall, take it all in, it's really a great opportunity!