There are zillions of articles and books written about goal setting and writing the goals down.
I personally don't fancy the word "Goal" ... it's ok for short term tactical stuff but when you want to make a transformational change, the word "Goal" lacks emotion and a deep burning desire that comes from your inner-self.
Dreams are powerful ... but most of our dreams, both personal and professional are buried under a massive heap of day to day stuff life throws at us.
So here is a question for you to ponder about ...
"If anything was possible, what is something insanely great that you can do with your life ?".
It will take some time for you to answer this question; weeks, days, months or even years. Once you find an answer, rather than writing it down, start talking about it to as many people as you can. You will find that, every time you speak to someone, your Dream will become clearer and clearer, and the magic of "Cosmic Energy" will start to guide you in unexplainable, random & strange ways towards your dream.
PS. I learned the term "Cosmic Energy" from a book called "Embracing Uncertainty" from Susan Jeffers. Great book to read if you are going through a huge change (planned or unplanned) in your life.