Music...Oh yes!
I have a ton... I've listed some of my favorites from various types of music. IMHO, the best work out music is 1990's dance music. The beat was perfect walking/running on the treadmill.
C&C Music Factory - Everybody Dance Now
Uncle Luke - Shake What Your Mama Gave Ya
Blacked Eyed Peas - Pump It
Blink 182 - All the Small Things
Venga Boys - Boom Boom Boom
Gap Band - You Dropped a Bomb On Me
Taylor Dayne - Tell It to My Heart
Gina G - Ooh Aah Just a Little Bit
Ramones - Hey Ho Lets Go
Aerosmith - Dude Looks Like a Lady