I also have charge of the Economic and Social Book Department of the publishing firm of Harper and Brothers. The insistent demands of these three tasks leave me no time to fret and stew and run around in circles. Second: I am a great dismisser. When I turn from one task to another, I dismiss all thoughts of the problems I had been thinking about previously. I find it stimulating and refreshing to turn from one activity to another. It rests me. It clears my mind. Third: I have had to school myself to dismiss all these problems from.