Time management is essential for maximum health and personal effectiveness. The degree to which you feel in control of your time and your life is a major determinant of your level of inner peace, harmony, and mental well-being. A feeling of being “out of control” of your time is the major source of stress, anxiety, and depression. The better you can organize and control the critical events of your life, the better you will feel, moment to moment, the more energy you will have, the better you will sleep, and the more you will get done.
Details about Time Management – American Management Association
It is possible for you to gain two productive hours each working day, or even double your output and your productivity, by using the ideas and methods taught in this book. These techniques have proven successful for many thousands of executives in every field of endeavor, and they will prove successful for you, too, as long as you have what I call the four Ds.