If you want to find your calling, your passion, your purpose ask this simple question.

If you want to find your calling, your passion, your purpose, I suggest you try everything that sparks your interest. And over time, ask yourself this simple question.  
  
What can't you stop doing?
Do what you can't stop doing.

For myself its
1. Thinking
2. Writing

If writing is your thing then write. If your thing is cooking then cook. It your thing is exercise then workout. Whatever your drive, whatever it is that you seem to always do, or go back to that is productive, creative, enjoyable. Do that, don't worry about money, or making it a career. Do it because its who you are, its what you enjoy. 

I love writing, but this isn't my job or my vacation. It's something that I can't stop doing, so I don't fight it, and I don't worry about it. Writing, thinking, taking notes, reflecting, is... me.

If you have something like that I say keep doing it, and if you keep doing it then eventually a path will open and you will have clarity.

What is it that you can't stop doing?