David Allen (born December 28, 1945) is a productivity consultant who is best known as the creator of the time management method known as "Getting Things Done". Allen has written three books: Getting Things Done: The Art of Stress-Free Productivity, which describes his productivity program; Ready for Anything: 52 Productivity Principles for Work and Life, a collection of newsletter articles he has written; Making It All Work: Winning at the Game of Work and Business of Life, a follow-up to his first book. In 2015 David Allen also wrote a new updated version of Getting Things Done: the Art of Stress-Free Productivity. He lived in Ojai, California with his fourth wife, Kathryn. In May 2014, they moved to Amsterdam in the Netherlands.