First up is Use Me, perhaps my favorite Bill Withers song. I love the sheer simplicity of it.
Next (after the jump) is Ain't No Sunshine. Fun fact- he says "I know" 26 consecutive times at one point in this song, and for some reason it works.
Grandma's Hands is perhaps best known by people under 40 as the song sampled by BLACKstreet in their single No Diggity.
Finally, an upper in Lovely Day.