Not that anyone asked, but if you'd like to try something meditative and fun while running: chant your 'secret code' in time with your strides. You can chant it outloud or to yourself, whatever feels right.
The secret code: your birth numbers, in reverse order. You start with the year, then the month, day and hour and minute if you know them. I was born on Sep. 24th, 1963 at 4:24am so my code is:
1-9-6-3-0-9-2-4-0-4-2-4
And while running these numbers through my head (and legs, and arms, spine and belly), I'm think about turning the clock backwards, and returning to the minute of my birth, my first breath, my first glance at the world 'outside'.
After as while, the mind strays, it becomes difficult to hold onto the pattern. At that point you just let it go. And run. And breathe. And smile