a current student here
Apply early and try to get into the honor's program as honor students, athletes, and adult students all get to schedule classes early. When you get into the later years, being able to get all the classes you want, at the times you want, is a beautiful thing.
Also, learn to love the cold and how to stay warm in it. Last winter we experienced temperatures at -20 F, so bundle up! You will need a quality jacket, water proof boots, gloves, a scarf, a hood (or ear muffs!), and muscles! (Walking up hill with 20lbs on your back in the snow isn't the easiest thing).
Don't buy your books from the bookstore unless you absolutely have to. (For example, there may be an online code you need for class, or a teacher's special edition copy). There are websites like chegg.com and bookrenter.com that normally have the same books at a cheaper price. You should also consider renting-you won't need that writer's handbook when you start your career (all of it can be googled). Nor will you need that Art History book, if you are an engineer! Buy and rent smart! Also, don't buy t-shirts from the bookstore. You will be given free t-shirt all the time. Don't waste your money.
Lastly, go to Bingo (trust me, they give out the BEST stuff) and all the events on campus. You're paying for them, might as well enjoy them.