"Feelin' Alright" by Traffic from the Feelin' Alright: The Very Best of Traffic album is the Song of the Day! It's almost as if the chorus has a different melody or rhythm than the rest of the score and this lends an almost hypnotic quality that makes listening to this song very easy. MTV calls the band's style very Jazz-like. I'm not entirely sure what the lyrics mean, though, as they seem to be about two different things. Except for the chorus I don't really listen to lyrics much* anyway. The tune is addictive enough, though, to make it a worthy SOD.
*Good thing, too. Right now "The Calling" (Santana & Eric Clapton from Supernatural) is belting out of iTunes and the few lyrics on that track leave me completely clueless.