There are a lot of good sources out there to help you prepare for plebe summer.
I don't know if you attended NASS but the SEAL who stopped by for PEP one morning is an amazing fitness expert. Most people have already seen his site but here it is again
http://www.stewsmith.com/
He has a lot of good stuff, even an ebook targeted for service academies.
From what I've read and seen, Crossfit (
www.crossfit.com) is also a really, really good place to get your workouts from. It's real intense workouts in a short amount of time, a real kick in the butt. They have a workout of the day for each day of the week, so you're never really left out to dry. If you don't have access to a weight room, theres a lot of variations and exercises to choose from, and you can always taylor them to fit your needs. I mean, I can't speak from experience like I've done plebe summer, but I feel pretty confident in saying that if you consistently use these, while supplementing your workouts with what you know you need, I think you'll be good.
If you want to periodically test yourself between now and summer, take the PRT and see how you do. It's 2 min of situps, 2 min push ups, and a 1.5 mile run, please correct me if I'm wrong. Looking on the internet I found these as the maxes and minimums,
Females: Maximum(Minimum)
1.5 mile run: 9:35 (12:40)
Pushups: 85 (20)
Situps: 101 (65)
Males: Maximum (minimum)
1.5 mile run: 8:15 (10:30)
Pushups: 101 (45)
Situps: 101 (65)
hope this helped.
also, forgot to mention, USNA has a recommended exercise routine
http://www.usna.edu/PlebeSummer/docs/25 PTR 2014 Exercise Routine.pdf