The most useful course I took in college was one on how to properly write documentation, although at the time I didn't really appreciate it as much as I do now. As far as the IT knowledge I gained, most of it was pretty obsolete even at the time so it's been less useful. I learned more in my first month working than I ever did in 4 years of college.

Specifics, no. However learning how to learn effectively has served me very well. Critical thinking, problem solving and sorting the wheat from the chaff of information that is helpful are all things I learned in college.

I don’t have a career, but learning how to gather information and assess it critically has been immensely useful during the course of my life. Definitely worth the three years at university!