You've probably heard before, but it will be a lot more challenging than juniors. Just be ready physically for a lot of running. Be prepared to suck down canteens like it's going out of style. The way I knew I was hydrated during Seniors was to drink enough water to the point right before I thought I would puke. Also be prepared for a lot more childish mind games, so keep your nerve. Oh yeah, and bring your own mole skin because your corpsman will not keep enough in the squad bay. (TAKE CARE OF YOUR FRIGGIN FEET!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) If you don't hygeine your blisters will get infected overnight, then you'll get cellulitis all the way up to your knee caps. I saw many candidates fall out for that very reason. Other than that, I would say try not to punch out that retarded candidate that you just despise, (you know the one) it will be that same one from juniors probably. Good luck and have fun.