"This is 10% luck, 20% skill, 15% concentrated power of will, 5% pleasure, 50% pain and 100% reason to remember the name"
-- "Remember the Name" by Fort Minor
I almost always workout on the treadmill - mostly fast walking - my old knees can't take running any more and shoulder tendonitis and sciatica keep me from lifting or squating. Getting old sucks

I listen to an eclectic mess of new and old - I setup my list so that the beat paces are in intervals - Queen, Michael Jackson - "Jam" and "They don't really care about us, Cage The Elepant (Ain't no rest for the wicked), lady gaga, Green Day, I warm up to Zombie by the Cranberries, etc
But the Fort Minor song really got me exercising again - I listened to it over and over to push through my first few sessions...then it got easier and now I have all sorts of songs.