" But if one can lock the door, disconnect the telephone, and sit down to wrestle with the report for five or six hours without interruption, one has a good chance to come up with what I call a “zero draft”—the one before the first draft. From then on, one can indeed work in fairly small installments, can rewrite, correct, and edit section by section, paragraph by paragraph, sentence by sentence. "

― Peter F. Drucker , The Effective Executive: The Definitive Guide to Getting the Right Things Done