I graduated in '92, but I am an adviser for a student organization on campus and what my dad told me in '86 still applies today.
GO TO CLASS.
Today, more than ever, it is easy for a student to talk themselves out of going to class on a particular day. "I can get the notes online". "I can get the notes from someone else". "Missing one day will not hurt". But missing class is the easiest way to fail. It does not matter how much you party, how much sleep you do not get, how much tail you chase, or how many late night CoD sessions you play. Go to class and you will not fail. Do not skip a single class.