Musicovery.com = intriguing

http://musicovery.com

You tell them what your mood is (or what you want it to be) and pick genres and eras you want. They generate a tree of streamable songs that match your mood. I haven't hated anything they've recommended yet! (impressive)

I'm big fan of musical therapy in general. I use music to change my mood all the time. Try it - it really works!