Ido my best thinking when I’m running. Let me rephrase that. What little thinking I do, I seem to do when I’m running. Here’s what I was thinking yesterday while running the Ukrop’s Monument Avenue 10K—“What were you thinking?“ I entered this race with a simple goal—run my age, 55. Failing that, my idea was to run at least as fast as the age at which I will first be eligible for social security.