Music for any time...

So i have a little trouble sleeping sometimes at night...err rather going to sleep i should say. I found this website similar to Pandora radio, except instead of a preset playlist depending on the artist you choose, you simply type in the mood you are, or want to be in and it gives you user playlists for that specific feeling. For instance, I use this when I lay down at night if I'm not feeling too tired but need to be asleep soon. I'l type in "sleep" and 5 or 6 playlists created by users pop up and you click one and I'm usually out light a porchlight in the ghetto after 1 or 2 songs...
the website is called 8Tracks.com, check it out if you like...Today I'm going to type in "concentration" while playing an MTT haha...