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Dan Roamis the author ofThe Back of the Napkin, which  wasFast Company's Best Business Book of the Year andBusinessWeek's Innovation and Design Book of the Year. His  consulting clients have included Microsoft, Google, Wal-Mart, Boeing,  Lucasfilm, The Gap, the U.S. Navy, and the White House Office of  Communications. His health-care analysis was namedBusinessWeek's Best Presentation of 2009. He lives in San  Francisco.Visit www.danroam.com