All of the Stoics are worth reading. Seneca is another great one to read if you haven't already.

Death will come whether we fear it or not, whether we think about it or not, whether we run from it or not, so I figure it's not much use doing any of those things. When it comes, it comes, and I will finally get to peek behind the curtains and see what's there (if anything — and if so, if I in whatever future form I end up as am able to remember it).

Of all the wonders that I yet have heard,
It seems to me most strange that men should fear,
Seeing that death, a necessary end,
Will come when it will come.
—Caesar, Act 2, scene 2

But in the Zen tradition, I don't think about it too much. Death is in the future; better to keep my mind on the present and not be distracted from reality by fantasies about what death may or may not hold.