It is not like a lake or a barrel of oil. It does not run out: it is not a scarce resource.
Creativity is like a small seed that can grow into a mighty tree.
Nurture creativity by making novel connections between distinct things, by studying the ideas you have, by having interesting conversations with people of differing mindsets.
Cultivate an insatiable desire for new creation. Let it be a deep trait.
Always be producing and your tree of creativity will flourish.