The Daily Routines of Famous Writers: Can Screenwriters Learn Anything Useful From the Work Habits of Famous Authors?

"You write until you come to a place where you still have your juice and know what will happen next and you stop and try to live through until the next day when you hit it again." - Ernest Hemingway

For more such inspiration from Hemingway and other writers (e.g., Kurt Vonnegut, Joan Didion, Ben Franklin), go to the post by Maria Popova on Brain Pickings.