I find that having a rather large bowel movement, followed by the flushing of my toilet, gets me in the appropriate trading frame of mind.
Yes - great music. Shine on your crazy diamond.....one of their best. Saw them three times live here in Germany. Already a long time ago ;(
I'll 2nd the pandora recommendation, it's pretty neat. I could never sit in complete silence and trade.
I usually listen to Dawn Upshaw's Girl with Orange Lips when I trade the open. During the day, I am partial to Mahler's Das Lied von der Erde and listening to Opera without Words employing Puccini's operas.
I was listening to some electronic music during the middle of a rally and I did a great job holding my position all the way up.