University is pretty fantastic, especially if you can work in your field during the summers. Really though, higher education is what you make of it. My suggestions would be:
Be active in the college community, whether that's in study groups, student union stuff, leadership roles. Participation in the community helps you get outside your own head and in the case of leadership roles, is something which looks VERY good on a CV.
Get to know your professors' research interests. Professors aren't just stale automaton whose job it is to relay information to you, they have their own interests well beyond Psych 1000. Getting to know your professors and their interests can open up a source of vitality and excitement which you just don't get when they're teaching students about the visual cliff for the thousandth time. Plus, professors can become friends, they can supervise your honors/masters thesis, or give you good references.
Take as many electives as you can in subjects which you don't have experience with; there's little more important than avoiding academic monoculturalism. You don't want to be in the middle of your M.Sc and not know in a non-wikipedian way about philosophy, history, anthropology... Getting a well-rounded education, especially for your undergrad, is something you keep with you for the rest of your life.
Education is the best thing you can do for yourself in life, take advantage of it
