There are some great quotations/writing tips in this post. I think my person favourite is:
“Get through a draft as quickly as possible. Hard to know the shape of the thing until you have a draft. Literally, when I wrote the last page of my first draft of Lincoln’s Melancholy I thought, Oh, shit, now I get the shape of this. But I had wasted years, literally years, writing and re-writing the first third to first half. The old writer’s rule applies: Have the courage to write badly.”
Or possibly Hemingway’s, “Write drunk, edit sober,” but the whole thing is definitely worth a look.