We fret about finding the best job after graduation, and brag about how we made more money than our friends. However, it's also important to do things that you love, not because of the monetary rewards, but for what you get out of it. So donate to charity. If you don't have enough money to donate, volunteer for an organization. They value your time much more than you'd ever think.
Alcohol solves nothing.
As an RA, I've learned a lot of things. One of the first is that people turn to alcohol far too often after a bad week, or a tough exam. Now I'm not saying that I don't drink, because that would be a total lie. But I've repeatedly seen students who's lives have been affected in numerous ways by alcohol. It's great to imagine that when you're drinking you have no problems, but when you wake up the following day, all your problems are back, sometimes sleeping in the bed next to you.