“By concentrating single-mindedly on your most important task, you can reduce the time required to complete it by 50 percent or more. It has been estimated that the tendency to start and stop a task—to pick it up, put it down, and come back to it—can increase the time necessary to complete the task by as much as 500 percent. Each time you return to the task, you have to familiarize yourself with where you were when you stopped and what you still have to do. You have to overcome inertia and get yourself going again. You have to develop momentum and get into a productive work rhythm. But when you prepare thoroughly and then begin, refusing to stop or turn aside until the job is done, you develop energy, enthusiasm, and motivation. You get better and better and more productive. You work faster and more effectively.”