On Wearing more than one hat

As a writer I am called upon to wear more than one fitgurative hat. One minute I'm sitting focused at my desk, writing away to meet a deadline, living in a world that is not my own reality/ The next I'm required to get dressed in my "famous author" clothes and go out to speak to people about my books, to entertain them, make them laugh and essentially to sell my books. These require completely different personality types, don't they? Silent, focused, shut away, in another world...and then wit...