I don't start a novel until I have lived with the story for awhile to the point of actually writing an outline and after a number of books I've learned that the more time I spend on the outline the easier the book is to write. And if I cheat on the outline I get in trouble with the book.
John GrishamAn outline is crucial. It saves so much time. When you write suspense, you have to know where you're going because you have to drop little hints along the way. With the outline, I always know where the story is going. So before I ever write, I prepare an outline of 40 or 50 pages.
John Grisham