Discovery still happens in the writing. You start in nonfiction with a whole lot more going for you, because all the discovery isn't waiting to be made. You've made some of it in the research. As you get deeper into a piece and do more research, the notes are in the direction of the piece - you're actually writing it.
Joan DidionWhy do you always have to be right. Why do you always have to have the last word. For once in your life just let it go.
Joan DidionWhat's so hard about that first sentence is that you're stuck with it. Everything else is going to flow out of that sentence. And by the time you've laid down the first two sentences, your options are all gone.
Joan DidionIt occurs to me as I write that this "white light," usually presented dippily (evidence of afterlife, higher power), is in fact precisely consistent with the oxygen deficit that occurs as blood flow to the brain decreases. "Everything went white," those whose blood pressure has dropped say of the instant before they faint.
Joan Didion