David Ogilvy, founder of Ogilvy & Mather, shares lessons from his experience as a door-to-door salesman. He emphasizes the importance of believing in your product, keeping promises simple and truthful, and using news to generate interest. Quality salesmanship requires confidence and listening skills. Embracing dialogue and long-term relationships while shunning tricks and quick fixes leads to success. Ogilvy challenges readers to discuss what makes a great salesperson and invites top performers to compete to demonstrate and improve sales techniques.