one very helpful question: “What is the piece really about?” (Not just “What is the piece about?”) Fondness for material you’ve gone to a lot of trouble to gather isn’t a good enough reason to include it if it’s not central to the story you’ve chosen to tell. Self-discipline bordering on masochism is required. The only consolation for the loss of so much material is that it isn’t totally lost; it remains in your writing as an intangible that the reader can sense. Readers should always feel that you know more about your subject than you’ve put in writing.
