Listen carefully and take careful

Do not volunteer to talk to much to class, even if there is someone incredibly good looking you want to impress. Because thats a pretty lame way to impress someone. And when you talk, you dont listen you mentally prepare your comment and tune out the professor. Also, a corollary to taking careful notes do not supplement your notes with outside materials, like a hornbook, etc. Your professor is giving the exam at the end of the semester, not the author of a hornbook you happen to buy.