A good excerpt from an Atlantic article: So You Want to be a Writer
Galbraith's first suggestion was to resist the fantasy that good writing can only be accomplished during moments of inspiration:
All writers know that on some golden mornings they are touched by the wand—are on intimate terms with poetry and cosmic truth. I have experienced those moments myself. Their lesson is simple: It's a total illusion. And the danger in the illusion is that you will wait for those moments. Such is the horror of having to face the typewriter that you will spend all your time waiting. I am persuaded that most writers, like most shoemakers, are about as good one day as the next (a point which Trollope made), hangovers apart. The difference is the result of euphoria, alcohol, or imagination. The meaning is that one had better go to his or her typewriter every morning and stay there regardless of the seeming result. It will be much the same.
He also emphasized the importance of revision. "Anyone who is not certifiably a Milton," he wrote, "had better assume that the first draft is a very primitive thing. The reason is simple: writing is difficult work."