Gherron Dragovalor
Space dad
Try Moodfuse! I actually just found this site about an hour ago when I was writing a post, and it's not too bad if I say so myself. All you gotta do is set the kind of feel you want, then the genre of music (I listen to pure instrumental for mine) and hit go. This will give you a playlist of music that should suit the general mood you need to keep you going.
http://moodfuse.com/
http://moodfuse.com/