How are you running? Smooth, choppy, aggressive, soft and gentle. Do you see the road as a friend or foe?
I just read an interesting article by Chris McDougall about resuming a lost running technique.
heres a link to him demonstrating said technique.http://video.nytimes.com/video/2011/11/02/magazine/100000001149415/the-lost-secret-of-running.html
Now get out there and do something.