How to Break the Habit of Excessive Thinking

Do you spend a lot of time in your head, thinking about many things? Do you find it hard to go still?  Is thinking an addiction?  Is it a pseudo sense of self? When I write poetry I do not feel I am thinking, I just let thoughts flow.  When I clown I don’t think much at all.  I am in a state of awareness of the present moment. The real teaching is presence not words.