1. Verbs HAS to agree with their subjects.
2. Never use a preposition to end a sentence with.
3. And don't start a sentence with a conjunction.
4. It is wrong to ever split an infinitive.
5. Avoid cliches like the plague. (They're old hat.)
6. Also, always avoid annoying alliteration.
7. Be more or less specific.
8. Parenthetical remarks (however relevant) are (usually) unnecessary.
9. Also too, never, ever use repetitive redundancies endlessly over and over again.
10. No sentence fragments.
11. Contractions aren't always necessary and shouldn't be used to excess so don’t.
12. Foreign words and phrases are not always apropos.
13. Do not be redundant; do not use more words than necessary; it's highly superfluous and excessive.
14. All generalizations are bad.
15. Comparisons are as bad as cliches.
16. Don't use no double negatives.
17. Avoid excessive use of ampersands & abbrevs., etc.
18. One-word sentences? Eliminate.
19. Analogies in writing are like feathers on a snake (Unless they are as good as gold).
20. The passive voice is to be ignored.
21. Eliminate commas, that are, not, necessary.
22. Never use a big word when substituting a diminutive one would suffice.
23. Don’t overuse exclamation points!!!
24. Use words correctly, irregardless of how others use them.
25. Understatement is always the absolute best way to put forth earth-shaking ideas
26. Use the apostrophe in it's proper place and omit it when its not needed and use it correctly with words’ that show possession.
27. Don’t use too many quotations. As Ralph Waldo Emerson said, "I hate quotations. Tell me what you know."
28. If you've heard it once, you've heard it a billion times: Resist hyperbole; not one writer in a million can use it correctly. Besides, hyperbole is always overdone, anyway.
29. Puns are for children, not groan readers.
30. Go around the barn at high noon to avoid colloquialisms.