When running everyday in the Marine Corps I found the following song to be very inspirational. After listening to it the miles dissolved easily.

Shoelace tied tight

Knee brace in place

Snowstorm and night, a Stockholm road called.

Memories of music, the thunder called

Off to race the police

Faster and faster, until, they stopped me.

“Are you a U.S. Marine?”

Yes

Watching their tail lights fade, filled with laughter and the sounds of thunder.