Philosophical Question: The Grimmest Question

Here comes another deep philosophical question.

If you knew, beyond doubt or possibility of refutation,

that NO afterlife exists after we die,

what could you do to make death - and life - meaningful?

The phrasing of this question is aimed directly at you, the reader. I want this to be personal. You must think of what you would do - not what somebody else says. Assume on the day science proves, beyond a doubt, that neither Hell nor Heaven exists after we die, that all the priests, scientists and philosophers of the world will have too much on their plate to make announcements - everybody will be on their own.

So the answer to this question is entirely up to you. No conferring.