The very last words of the last episode of the show are "Dead Like Me"
The cast thought that they would be coming back for another series. There are a couple of rumors as to why the show ends after two seasons, but one is repeated more than others. Mandy (Rube) didn't want to come back and Laura (Daisy) was already being shopped for another series, that ended up failing.
Rube can be seen placing little stones on the gravestones of his daughter and wife. This is a Jewish tradition: when one visits a grave, they place a small stone on the grave using their left hand.