Sitting in the back seat of a relative's car, I picked up a copy of Oprah Magazine.  The magazine was filled with articles about how to have a happy-go-lucky life.  The first article I read was called, "How to Be More Creative."  The gist of the article is that creative people cultivate synesthesia.  Poets for instance, actually try to feel the sadness in rocks and trees, or the temperature of a rainbow.  (I couldn't find that article online, but I did find this excellent one about musician Pharrell Williams and his synesthesia.)