Whether you're finishing up undergrad or preparing for a long stint in med school, your 20's define the rest of your life. Freedom, fresh knowledge, and ambition have recently fallen into your young hands. Now you just need a job and someone that you can stand for longer than three months. We know that your 20's can be perilous, but we think that we have a few tips to make sure that your 30's and 40's are enjoyable ones.