Most people who run never think about the movement of their bodies. They go through the motions without thinking about it. But runners need skills training, just like a tennis player needs to learn how to hold the racket.
For when it's time - Excellent training guide for running another marathon. Contrary to what a lot of people believe, it's important to run/train only 3 or 4 times a week. The 3 or 4 days of rest help your body to heal, regroup & not get burnt out.