Business relationships are a lot like personal relationships: You'll get a lot more done if the other party likes you. There is, of course, no way to train to be likeable, but entrepreneur and author Guy Kawaski notes that a person's 'likability' is a key ingredient in business deals, in this Entrepreneur Thought Leader Lecture given at Stanford University. Kawaskai talks about ways to be more enchanting – including his mathematical formula for the perfect handshake.