I was running about an hour every morning. It was almost like an addiction. Waking up was always difficult but I was overwhelmed with pleasure from the first strides. At the beginning I was listening to music to make time pass faster but after a few months of training I could run with my surroundings for sole entertainment. I was listening to my body instead, carefully examining each stride to adjust my run. I was prone to injuries so I learned to pay attention to the faintest pain signal.
Running is amazing in this sense that its whole essence is to keep on progressing without getting hurt.
Something I once read in an article stuck with me and came to my mind whenever I was speeding up in a burst of enthusiasm: a healthy runner beats an injured runner every time.