My big piece of advice: Major in something useful (CS, check!), minor in something fun. A lot of the computer science classes you take will be boring AF, or you'll start to bang your head against the desk wondering why you have to know how operating systems work when you just want to make iOS apps (or vice versa!). Some of the classes will be deeply math heavy. It can and will seem overwhelming at times. So minor in something fun. Pick something that has no bearing on your chosen career path. Minor in Theater or Music or Art or Literature or Physical Education. The best part about minors is that you generally get to take all the fun classes and not the terrible ones! You'll meet a whole bunch of people with diverse interests that aren't solely computer nerds.
As far as the CS stuff is concerned, focus on absorbing as much as you can. Contrary to what other people said, don't sweat the details. You should have a fundamental understanding of all the big areas (databases, languages, algorithms), but you don't need to be an expert in any of those things to get a job. In fact, 90% of the subject matter you learn in college won't be relevant to whichever job you get. BUT... the act of learning is important, and the fact that you have fundamental understandings of those things will get your foot in the door
Think of your college degree as a ticket to an interview, and your first job as the real education. Your degree is proof of two things: 1) that you can learn, and 2) that you can start, stick with, and complete a large, multi-year project. Nobody expects someone with a Bachelor's degree to be an expert programmer, but they _do_ expect critical thinking skills and the ability to learn. You'll learn more on the job in the first 6 months than you will in 4+ years of college education... so don't put too much stress on yourself there.
So... take it seriously, but not too seriously. Study hard, but take fun classes too. Make connections in your computer classes, but make friends across a wide variety of interests. Learn the fundamentals, but don't sweat the details.
(Also, pro tip: nobody gives a shit about your GPA. A 4.0 doesn't get you anything in the real world except a rude awakening. By all means, try to get all A's if you can, but don't burn yourself out by trying to get perfect grades.)