CNN's John Sutter has been using a tool called the brain for 25 years. He says it allows him to organize his thoughts in one place and see them all at once. This week he will show you how this works with jazz hands, which is an informal way of saying "I like it" or "I don't like it" Jerry Seinfeld: I think that different tools for different folks is sort of central to how I think about this world that needs to emerge.