Rules to Write Good
  1. Don't use no double negatives.
  2. Make each pronoun agree with their antecedent.
  3. Verbs has to agree with their subjects.
  4. Don't use commas, that aren't necessary.
  5. Try to not ever split infinitives.
  6. Its important to use apostrophe's correctly.
  7. Don't write run-on sentences they are hard to read.
  8. It behooves the writer to eschew archaic expressions.
  9. Don't use hyperbole: not one writer in a million can use it effectively.
  10. Avoid clichés like the plague.
  11. A truly good writer is always especially careful to eliminate the all-too-frequent use of adverbs.
  12. Placing a comma between subject and predicate, is not correct.
  13. You should however enclose parenthetical words in commas.
  14. Correct spelling is esential.
  15. Always proofread your copy to see if you've any word out.
  16. It is felt that the passive voice should be avoided.
  17. Never use a long word when a diminutive one will do.
(Adapted from the Advocate, February, 1980, Wayne State University, School of Law.)

Moreover:

George Orwell: Politics and the English Language (1946)

President-Elect Barack Obama's victory speech in Grant Park, Chicago, November 4, 2008. Other speeches by Barack Obama