Justice makes good workout music
podcasts are a pretty good idea, i recommend the soul and gospel shows on wfmu
Black Devil - Disco Club is very cool. in spite of the name, it's actually rather subdued --
http://www.discogs.com/release/307518
if you like classic rock, you may enjoy Brian Eno's albums from around 1973 - 75
if you like Amy Winehouse, check out her producer Mark Ronson
Boards of Canada are good for relaxing