I am a plebe right now, and I have some advice of my own to offer:
Honestly, the most important things you can think about prior to I-day/PS all relate to your attitude. You can waste what precious little free time you have now getting ahead on rates, but trust me, even though you may be stellar when it comes to rates, but not all of your classmates will. We had one plebe in my platoon who just flat-out refused to learn his rates, and as a result got assigned thousands of lines of writing assignments. His squadmates would help him complete them, doing tons of writing assignments themselves, even though they knew all of their assigned rates. So even though you’re squared away, you’ll still be helping to make up for your classmates’ shortcomings. Enjoy the little time you have now – spend time enjoying the little things (wearing civilian clothes, enjoying media, walking down to breakfast whenever you want in your pajamas), being with family and friends, because come summer, you won’t have that anymore.
That being said, my platoon was incredibly lucky. Our first set detailers were an amazing bunch, just truly great leaders, and managed to keep everyone motivated, even when morale went down. Our platoon commander sat us down one day, just a week or so into PS, and said that all of us must have had a reason to come to the Naval Academy. Whether it was to be an aviator, or a Marine, or a SEAL, or even it’s as nonspecific as just to serve, that’s what would drive us for four years. You have to always keep that in mind, and never let that reason go, even when times are tough. Don’t lose sight of that, even throughout the rest of Plebe Year.
He was a prior Marine, and also gave us advice from his time at boot camp. When the detailers are making you do things that seem completely pointless and are a massive waste of time, and you’re sweaty, tired, upset, pissed as hell, let yourself go of all emotions. Don’t let yourself get mad at the detailers – if you do, they’ve won, they’ve gotten to you. If you can’t bring yourself to look on the bright side (because there will be times when you just can’t) just go empty and don’t think of anything. Just get through it. No one evolution lasts forever, and they all end eventually. Better times do come, even if it’s only that short 30 minutes of personal time right before Blue & Gold.
Finally, he told us it’s all mental. Don’t let your mind limit what your body can do. You’ll be surprised how far you can push your limits, but how will you discover that without testing them? Never tell yourself that you can’t, because then you can’t. Once you get into that mindset, it’s very hard to get out of it. You can do it, and you will.
And there's no point in getting overly nervous about I-Day. Unless you went to NAPS or are a prior, it will probably be one of the most confusing, scariest, longest, most memorable days of your life (I still get flashbacks every time I walk into certain parts of Alumni Hall). There's no point in worrying about it now, just deal with it as it comes. That's the key to Plebe Summer - take things one step at a time, and suddenly you'll find yourself on the other side.