Don't get discouraged. As far as I'm concerned, a positive attitude is the most important attribute any runner can have. You'll need it often. Every runner has bad days, every runner has occasional injuries, and every runner eventually slows down (take it from someone who has slowed down a lot). But as long as you maintain a positive attitude, you'll find ways to overcome the obstacles and continue running. After all, running offers countless rewards. It's simply up to you to find the ones that have the most meaning for you.