I'd say: focus. Get as much as you can out of being in school right now-- you're unlikely to get a chance again to spend 4 years dedicated solely to expanding

I'd say: focus. Get as much as you can out of being in school right now-- you're unlikely to get a chance again to spend 4 years dedicated solely to expanding your knowledge. Learn everything you can. Find out who the best professors are (ask around, you'll find out quick) and take whatever classes they are offering. (A good professor can make even the dullest subject come to life; a bad professor can kill even the most fascinating topic.) Learn what you can from your friends; don't pass up any opportunity to learn. And, finally, try to pick up as many good habits and disciplines as you can-- you'll find years from now, you still have some of them.