If you care about death do these:
1. Never forget worship, put religion higher than money.
2. Obey with everything on bible, quran or any other scripture.
3. Make your family and other people happy.
These are enough, you don't have to think about anything because no one know when people will pass away. Today we can be healthy, but no one know about tomorrow. That's why, as long as you live you're doing good for humanity and spiritual, there's no reason to worry about death, because you're always ready in any situation.
You made lot of sense, but how would you know that you're in the right religion that could help you in aging gracefully and with dignity as the OP stated? What if you're in a family made up of terrible people you don't care to make happy? I think there is a limit to what we can do and accomplish to be happy in life. so you do your best and leave the rest. By the way I believe in the spiritual and supernatural.