You've approached living your purpose from all the obvious angles:
- do what you love
- turn your greatest challenges into tools and treasure
- take something you know how to do and teach others how to do it for themselves
And of course you probably know your purpose does not exist in a vacuum, it doesn't touch much in a bubble, and it's really better if, instead of simply broadcasting wishes, you come down from your Tower and serve.
But there is one other intention you may not yet have considered:
Identify a tribe to which you belong and ask yourself how you will lead it.
Image credit h.koppdelaney via Creative Commons on Flickr