We all need to live our life for an audience of One. We need to fulfill God's purpose for our life.
Once you identify your purpose it is helpful to write the epitaph of your life. What might others say if you fulfilled your complete purpose on earth once you are gone? What would you write on your tombstone? I believe mine will say "His adversities helped many."
Mark Twain once said, "The two most important days in your life are the day you were born and the day you find out why."
Purpose is not so much about what you do as who you are.
The Bible says we are called to glorify God in whatever we do.
List the things you would like said at your funeral? What is the first thing that should come to people's mind when they say your name? Your "personal brand" is like a brand of a product. People know that brand based on their experience with it.
When you consider the totality of your life, what do you want people to think about when your name is mentioned.