William Safire's Rules for Writers:

-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 carefully to see if you words out.

-If you reread your work, you can find on rereading a great deal of repetition can be 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.)

-Don't overuse exclamation marks!!

-Place pronouns as close as possible, especially in long sentences, as of 10 or more words, to their antecedents.

-Writing carefully, dangling participles must be avoided.

-If any word is improper at the end of a sentence, a linking verb is.

-Take the bull by the hand and avoid mixing metaphors.

-Avoid trendy locutions that sound flaky.

-Everyone should be careful to use a singular pronoun with singular nouns in their writing.

-Always pick on the correct idiom.

-The adverb always follows the verb.

-Last but not least, avoid cliches like the plague; seek viable alternatives.

Notes

here.