Book Reports / what is shakespeare saying about death in hamlet? [4]

I have to write an essay in class tomorrow about a theme in Hamlet. The first thing that came to mind was the theme of life/death because there is certainly a lot of evidence for it in the play, but after reading through the obvious parts i am having trouble figuring out what i can say about death other than it happened a lot and its thought about a lot. What do people think shakespeare is trying to say about all of this death? What is his point?

thanks