I never run with headphones. One day barefoot running with a fairly high cadence this tune got" in my head" and kept me going. It is Radar Love by Golden Earring. I really like the base line and shufflling drum. What tunes work for you?
http://www.youtube.com/watch?v=JeRa3RtBiIU
http://www.youtube.com/watch?v=JeRa3RtBiIU