Learning stuff can be done on your own any time. The best use of your time in college is to cultivate professional contacts. Keep an eye out for professors who appear to be in charge of research projects with outside funding and volunteer to help out by doing whatever nobody wants to do, even if it's unpaid and even if it cuts into your study time. Be the first person that comes to mind when the professor's high flying industry friends tell him they wish they could find some bright highly motivated intern. If you don't think you need to try this hard this soon to find a job I hope you're independently wealthy.