Everyone needs music. My favorite sources:
Juno Records - all the vinyl you will ever need
Phonica Records - great store
Frisky Radio - the best beats on the internet
Samurai.FM - great selection of music online
DJ Advantage - learn how & find equipment
Sasha - the best DJ on the planet
John Digweed - the second-best DJ on the planet
Abelton Live - serious software for production & live mixing
Jambase - nice collection of info on jam bands