The Twenty Common Errors from Lunsford's St. Martin's Handbook, 6e
1. Wrong word
2. Missing Comma after Introductory Element
3. Incomplete or Missing Documentation
4. Vague Pronoun Reference
5. Spelling (including homonyms)
6. Mechanical Error with a Quotation
7. Unnecessary Comma
8. Unnecessary or Missing Capitalization
9. Missing Word
10. Faulty Sentence Structure
11. Missing Comma with a Nonrestrictive Element
12. Unnecessary Shift in Verb Tense
13. Missing Comma in a Compound Sentence
14. Unnecessary/Missing Apostrophes
15. Fused (run-on) Sentence
16. Comma Splice
17. Lack of Pronoun-Antecedent Agreement
18. Poorly Integrated Quotation
19. Unnecessary or missing hyphen
20. Sentence fragment