I try to follow this:
(i) Never use a metaphor, simile, or other figure of speech which you are used to seeing in print.
(ii) Never us a long word where a short one will do.
(iii) If it is possible to cut a word out, always cut it out.
(iv) Never use the passive where you can use the active.
(v) Never use a foreign phrase, a scientific word, or a jargon word if you can think of an everyday English equivalent.
(vi) Break any of these rules sooner than say anything outright barbarous.[From George Orwell, "Politics and the English Language," 1946 ]