Getting Things Done: The Art of Stress-Free Productivity by David Allen (2002).
Ready for Anything: 52 Productivity Principles for Work and Life by David Allen (2004).
How to Win Friends & Influence People by Dale Carnegie (1998).
The 7 Habits of Highly Effective People by Stephen R. Covey (2004).
The Power of Focus: What the World’s Greatest Achievers Know about the Secret of Financial Freedom and Success by Jack Canfield, Mark Victor Hansen, and Les Hewitt (2000).
Focus Like a Laser Beam: 10 Ways to Do What Matters Most by Lisa L. Haneberg and Keith Ferrazzi (2006).
The Power of Focus for Women: How to Live the Life You Really Want by Fran Hewitt and Les Hewitt (2003).
Find Your Focus Zone: An Effective New Plan to Defeat Distraction and Overload by Lucy Jo Palladino (2007).
The Practicing Mind: Bringing Discipline and Focus into Your Life by Thomas M. Sterner (2006).