Reading threw the comments I came across a very good point that I neglected to mention... talking to other students. This is useful for many reasons. First off, you never know who you're gong to meet. For all you know you could be sitting next to your future wife/husband. Knowing a few people in the class can also be a life saver. Lets say you miss a class and you need the notes for that test coming up, you now have someone to ask. Speaking of tests, talk to the people you know about having a study group.
Pro Tip: always always always dress to impress. You dont need to show up in your sunday best every day but make sure to shave, shower, and were clean clothing. Remember, no one likes a dirty neckbeard, there almost as bad as hippies.