I have studied time management for more than forty years. I have immersed myself in the works of Peter Drucker, Alec Mackenzie, Alan Lakein, Stephen Covey, and many, many others. I have read hundreds of books and thousands of articles on personal efficiency and effectiveness. This book is the result. Each time I came across a good idea, I tried it out in my own work and personal life. If it worked, I incorporated it into my talks and seminars and taught it to others.