I love to listen to the Voice Within by Christina Aguilera. Gives me the push I need when I'm at my lowest.
Minor Swing, Birele Lagrene's version. It makes me want to type fast! I love that Eminem song, too, by the way. Makes me want to dance though - I can't listen to that music when I work because I'll just blow everything off and start dancing.
even though it is a pretty silly little song can't but me love by the Beatless always cheers me up and gets me raring to go Whatever the Circumtances. I find this with the Beatless generally but this song is particulculars.
A song that I just stumbled onto last week is "Listen to the Sound" by Building 429. They are a Christian group, but the message and power of this song transcends religion and culture. I highly recommend it.