In writing fiction, the more fantastic the tale, the plainer the prose should be. Don’t ask your readers to admire your words when you want them to believe your story.
-- Ben Bova
If a writer knows enough about what he is writing about, he may omit things that he knows. The dignity of movement of an iceberg is due to only one ninth of it being above water.
-- Ernest Hemingway
Omit needless words.
-- Oliver Strunk
While you're at it, go read Strunk here. It's excellent advice.