I'm in my 2nd year at university, so go for campus tours, talk to some current students because they'd give you decent advice on the courses. You could also talk to the professors and see how the courses and such are.

In addition to getting good study habits, you want to make some friends for a study group. It will help a lot.

You'll hear some of this nonsense in your first year: what's your major? Doesn't matter, it's first year. Take a variety of courses because you may like something since you usually have good professors (although I've had a few horrid ones). If you don't know your major, doesn't matter. It's only of concern in your 3rd-4th years.

Pay attention during lectures. Many times the profs give hints or they say what to not know for a test.

Read before and after classes, and when you do, don't just stare aimlessly at the page; highschool is about learning to read and write. University/college is about thinking. You need to think, understand, apply and memorize in your own words. Usually the textbooks overcomplicate things or give something that is 1 line into a few pages, so look what's relevant.

Also, try to get past tests. At our campus, if you join certain clubs for the subjects, you can buy past tests, which shows you what questions are repeated, how does he/she ask, and what to focus on.