I find that my flourishing is at it's best when I'm listening to songs with a good beat, and no lyrics. I'm not talking about your average random techno, but techno with rhythm and a tune. For anyone interested in songs like this, a few good ones to check out are:
Propellerheads - Take California (used by dan and dave in the system preview)
Andy Hunter - Go (starts off slow, but then gets intense later)
Linkin Park - Session (when I'm doing slower stuff)
and a lot of stuff by Paul Oakenfold, can't think of any names, but good beats.
Cheers,
-Matt