1) Keep on top of stuff. Everyone procrastinates... and everyone crams when it's looking like the shit is about to hit the fan. It's normal to want to do that too. Don't. College is stressful enough as it is, don't add to the stress by waiting too long to do things you should be doing now.
2) Talk to people who you do not know. I'm a junior and I still practice doing this every day. People sitting next to you in class, or people who sit down at your table at lunch. Trust me, I'm naturally introverted and I know how hard it can be to reach out to people, but most people actually want to talk, and they'll be glad you talked to them. Easy things to start with are as simple as shaking hands and telling them you name, then asking them what their major is. If they know, ask them what interested them in that major, just work to get to know them better... etc. Seriously, sometimes the difference between whether you sink or swim will rest on having friends, but if you don't talk to anyone, it's hard to make new friends.
3) Be careful with drugs and alcohol. I'm talking from experience on this one. My sophomore year, I got really depressed, and started doing a lot of drugs. I'll never completely recover from the damage that did to me. After you've spent three days convinced that the old soul died, and you're a new soul who has been given access to his body and memories... well, you can't come back from that... not all the way. I haven't had a flashback in a while, but the last one I had scared the hell out of me. Seriously, I could keep going on about the just how much drugs can fuck you up, but I won't. It's okay to smoke a little weed from time to time, but don't be one of those guys who lets drugs become a way of life, it'll mess you up physically, emotionally, spiritually, and it'll definitely take a toll on your schoolwork.
4) Learn to love the period trick. Now, before I tell you the period trick, let me preface myself by saying that the period trick ONLY works with hardcopy papers, if you've got to submit an electronic copy then forget it. But if you're turning in a hardcopy paper, and need some extra filler, the period trick will do wonders. It's so easy. All you have to do is go through the paper, and change the font size of all the periods up one or two sizes. I know it sounds ridiculous... but the period trick will seriously add at least a couple paragraphs worth of length to most papers. If you don't listen to my advice #1, and get in a jam, the period trick will save your ass big time.