Have you ever meditated before? It's a nice little practice that'll take you out of the real world for a few moments. Not only does meditation calm your mind, but it brings you a little bit of inner peace. An app like Headspace, free and available for both Android and iOS, is a good program that'll help get you started. Each session lasts 10 minutes to give beginners a good feel on how to meditate. If you love it, you can pay to upgrade. All in all, it'll calm you down and make you feel really good about yourself.