Question: what are the principles of effective written communication?
Answer: Brevity. It is bad manners to waste [the reader's] time. ...  Clarity. It is bad manners to give [readers] needless trouble. ...  Communication. The social purpose of language is communication—to inform, misinform, or otherwise influence our fellows… . ...  Emphasis. ...  Honesty. ...  Passion and Control. ...  Reading. ...  Revision.