5. Pop bubble wrap.
Yes, I'm serious. I got almost nothing out of college. I've also found that even computer science majors can't do any programming unless they've had actual work experience... Everything major-germane I've actually learned was through self-study.
Disagree, where I work I had to delve back into college books to make sure I was using proper coding structures and practices. Got ripped a new one a couple times because I ignored practices I learned in college work but not in my own toy projects. One big problem is that when grading assignments they worry more about if it works than how good the actual coding is however.