(1) Never use a metaphor, simile or other figure of speech which you are used to seeing in print.
(2) Never use a long word where a short one will do.
(3) If it is possible to cut a word out, always cut it out.
(4) Never use the passive where you can use the active.
(5) Never use a foreign phrase, a scientific word, or a jargon word if you can think of an everyday English equivalent.
(6) Break any of these rules sooner than say anything outright barbarous.