E. L. Doctorow once said that "writing a novel is like driving a car at night. You can only see as far as your headlights, but you can make the whole trip that way." You don't have to see where you're going, you don't have to see your destination or everything you will pass along the way. You just have to see two or three feet ahead of you. That is right up there with the best advice about writing, or life, I have ever heard.
-- Anne Lamott (in her book Bird by Bird)