How do I get in shape for Marine Recruit Training?

I'm 17, and just enlisted into the USMC under the delayed entry program. I can already perform the entry physical (1.5 miles in like, 13 minutes or something, 60 crunches, and 5 pull-ups), but I would like to be less.. well.. shell-shocked upon entry. Does anyone know any decent exercises that would help when I enter recruit training in about a year? By the way, I wasn't sure which topic to put this under.. Sports Or Military? Oh well.