Also, avoid awkward or affected alliteration. Last, but not least, avoid cliches like the plague. Rules for Writers William Safire Remember to never split an infinitive. The passive voice should never be used. Do not put statements in the negative form.
Verbs have to agree with their subjects.
Proofread care-fully to see if you words out. If you reread your work, you can find on rereading a great deal of repetition can be avoided by rereading and editing. A writer must not shift your point of view. And don't start a sentence with a conjunction. Remember, too, a preposition is a terrible word to end a sentence with.