Ray

“I don’t know any creators of fictions who start writing with nothing but a blank page. (They may exist. I just haven’t met any.) Mostly you have something. An image, or a character. And mostly you also have either a beginning, a middle or an end. Middles are good to have, because by the time you reach the middle you have a pretty good head of steam up; and ends are great. If you know how it ends, you can just start somewhere, aim, and begin to write (and, if you’re lucky, it may even end where you were hoping to go). There may be writers who have beginnings, middles and ends before they sit down to write. I am rarely of their number.”
― Neil Gaiman, The View from the Cheap Seats: Selected Non-Fiction