Another method I discovered in the past year...if you have a CD with some session player whose tone you dig, take the time to chase down other recordings that session player's done. If they're well-established and versatile, it can take you on a whirlwind tour of genres, and you can find some real gems that way.
A link to pull up quick-and-dirty studio credits lists:
http://www.957kjrfm.com/iplaylist/
Just type in who you're looking for in the box by "Artist Search". A surprising number of artists and recordings are stored in this database.
I then use Amazon to look up the albums to listen to sound clips (where available), so I know what I'm in for. Then it's off to the hunt! I'm shocked how many flippin' AMAZING albums I found this way, and for sinfully low prices (eBay penny auctions, anyone???).
Hope this helps. Have fun! And if you'd like me to recommend any specific recordings that have bent my ear, just ask.
