We all have a purpose but many of us don't know what our purpose is.  If you have ever questioned what you are supposed to do with your life, then you are seeking your purpose.  Finding your purpose involves self discovery and requires you to let go of what people have told you your purpose is or thinking that you don't even have one.  Take some paper and a pen and jot down your thoughts, erase them, modify them and then jot down some more or build on what you wrote.  You'll know when you've found it because you will find yourself greeting each day energized and full of excitement.

Your purpose in life is to find your purpose and give your whole heart and soul to it. ~Gautama Buddha