So one of the hardest questions to struggle with is "what is My purpose?" Obviously, everyone will have a different answer to this question. I have decided, that overall, my purpose is to make the world a better place. Now this is two-fold. First, I need to make a world that is more loving, helpful, safer, and more ethical. Secondly, I need to make myself more loving, helpful, and ethical. I try to do this in several ways:
1) I live according to my core values - Adventure, Impermanence, Unity, Discipline, Simplicity, Efficiency
2) I work in energy generation - I specifically work in the Solar industry right now, but I believe that stable, cheap, and sustainable energy generation is going to fix a lot of the problems we have in the world.
3) I donate to charity - I recognize that not everyone has the money to give away, but if you do, pick a few causes you want to support. Not everyone needs to support the same causes, and you can't support everything. So I'd pick two or three causes, vet the charities to make sure your money is going to good use, and donate what you can. I support my local food bank, UNICEF, and the ACLU.