I think college is just time on task. Think of it as a means to an end. I would advise that you get involved in your classes, and try to learn something in each one. I went back to school at age 29, and am finding that every once and a while, I remember some bit of obscure knowledge that helps in a given situation. Not all the time, of course, but you will take some things with you. My favorite class of all: Art History. Seriously, I am an accountant, but that class was more useful to me than any other. I would advise you to take it, if you have not.