I would have to say that you should review physiology, with an eye toward patho. You shouldn't need to get too in-depth, just review the info from time to time so that you remember the material. Beyond that, I would say that you should be far more focused on ensuring that you can devote a significant amount of time to your studies. For the accelerated programs, that means you shouldn't work. Not at all, if possible. You're going to get a lot of information presented to you very quickly. Once you know what reading assignments you're going to have, start reading those assignments. The idea is that you should get ahead about 2-3 weeks of where you will be in your assignments and stay that far ahead. That way, you have some cushion for life events that throw you off. It's far easier to stay ahead than it is to catch up to the present if you're behind.
I would also say that if you've been doing vitals already, great. If not, don't fret about that. They'll teach you what you need to know to begin doing your assessments.
The last thing is that you probably should just get used to the idea that nursing care plans are going to be a horrible pain in the back-side. Just do them. I hate them with a monumental passion that I can not adequately express... but I do them. Why? They provide a good template for why we do the things we do. It's not for the patient's benefit that we do those care plans. It's for ours. Care plans make it a lot easier to integrate the classroom learning with the clinical learning. And I'll be very glad when I no longer have to do those care plans... because it means that I've gotten to the point where I understand the processes well enough that I n longer need to do those plans, even though I might still have to prep some on my patients so that I know what's safe and what isn't.
Just do your level best to understand the information that you're going to be presented with. Probably the last bit of information: testing will likely be very different from what you're used to. Be ready to critically read. I missed a few questions simply because I misread the question. Most questions you've had to answer in your classes to date probably are those that require simple regurgitation of information. Now you're going to have to take the information you've read and be able to answer questions by applying that information you've read. That's a whole different level of thinking. It won't be easy, but it's not impossible. I was worried about that myself. I know that I can do it, because I'm doing it. While you may have been a 4.0 GPA student earlier, nursing school is so different that keeping that 4.0 GPA is exceptionally rare. Don't beat yourself up if you don't get grades you thought you'd get based on previous classwork. Concentrate on passing and if you happen to get good grades along the way, that's a bonus.