@LisaOz6 I always thought of an "author" as someone who writes books, whereas a "writer" may write blog posts, marketing copy, essays, or anything else.
@phoenixfire110 I go line by line and try to think of a more concise way I can say certain statements. Also analyze your descriptions and make sure your aren't adding things that aren't necessary to the story. I usually cut a lot of words this way.