I have often said I have only two strengths as a runner: 1. I don't injure easily. 2. I like to run. That second one is probably the single most important reason I can think of to run. It has driven me since my childhood (in spite of the fact that I am not a gifted runner), and it is driving me now. In 2001 I completed two marathons. Those races brought me both disappointment and satisfaction (both stories for another day), but what has stayed with me more than the marathons themselves, is the training. Much to my surprise, I found that I really love long runs. The 10 to 20 milers that are part of marathon training have a place in my memory, and, more than likely, in my imagination, that continues to draw me back in time to those days. I completed most of those runs with no one to talk to, no Ipod, no GPS device to tell me my time (just an old-fashioned wristwatch). I was surprised to find that I could settle into a pace and maintain it with astounding consistency, often run...