How can an audio book make you happy? Because of what it stops you from doing. Think about what you typically do during your commute. Do you talk on your cell? Think about your troubles? Curse the long line of cars ahead of you or at the guy who just cut you off? Instead of doing any of that, do something productive when you are forced to sit in traffic: listen to audio books. Buy some books about your area of business or your interests—maybe there’s an industry topic you want to know more about, or maybe there’s a new language you’d like to learn. You have to be on the road twice a day, so rather than wasting all that time, use it in ways that can return dividends for your future. You may even find yourself looking forward to your commute!