When designing a life we start with purpose, we start with why we were put on this earth.
The only way this why makes sense is that the result of us being here is that it becomes better than it was before. The only way this happens is if we create true value.
Your purpose then becomes how are you going to make earth/life/society better. What is the value that you were put here to create?
Make it your vision to design a life where you can maximize the value you create.