“Live a good life. If there are gods and they are just, then they will not care how devout you have been, but will welcome you based on the virtues you have lived by. If there are gods, but unjust, then you should not want to worship them. If there are no gods, then you will be gone, but will have lived a noble life that will live on in the memories of your loved ones.”
On the internet it’s frequently erroneously attributed to Marcus Aurelius, but whomever it was it’s worth contemplating. Technology may one day render death more a choice and living on in human memories a more lasting (if low fidelity) fate; for now it’s at least a decent guideline for regret minimization.