Take advantage of the school whenever possible. If tuition covers up to 20 credits, take 20 credits a semester (assuming you can handle the course load of course). If there are discounted summer courses and you are available, why not?
Take interesting and challenging electives. A lot of students just take the easiest electives they can, but in my opinion they are wasting their time and money.
Use the library. It will probably have access to all sorts of expensive journals and publications.
Become friends with your professors. Most of them are interesting, intelligent people.
Find clubs with like minded people or just hang out with people who are in college to learn (you will find that the majority of people in college are there because it's what you do after high school).
Finally, enjoy yourself. If you are not enjoying yourself than why are you putting yourself through all of this?
Take interesting and challenging electives. A lot of students just take the easiest electives they can, but in my opinion they are wasting their time and money.
Use the library. It will probably have access to all sorts of expensive journals and publications.
Become friends with your professors. Most of them are interesting, intelligent people.
Find clubs with like minded people or just hang out with people who are in college to learn (you will find that the majority of people in college are there because it's what you do after high school).
Finally, enjoy yourself. If you are not enjoying yourself than why are you putting yourself through all of this?