Do something that increases the absolute wealth of every person on the planet by at least one dollar. You could invent something. Perhaps it is just something

Do something that increases the absolute wealth of every person on the planet by at least one dollar. You could invent something. Perhaps it is just something you say that brings wealth to the world. Ideas can (rarely) have bare value, and can travel around the world in a day. If you make "improving the lot of every single person by a dollar" the centre of your life philosophy, you'll reap that back many times over.