Steve Lopez, the LA times columnist, was guest speaker at my journalism class. He told us he used to hand in his articles, go home and rewrite them on a typewriter, because he thought of a better way to say something, despite the piece had gone to print. I cannot express the relief I felt when I heard other people do that too.
http://www.latimes.com/news/columnists/la-columnist-slopez,0,7768178.columnist