1. Don’t confuse your and you’re
2. Begin new sentences with a capital letter
3. Don’t encourage people to use new! and exciting! to make their writing seem new and exciting
4. Don’t fear (semi)colons
5. Read your article before publication
6. Get someone else to read your article before publication
7. Don’t confuse lose and loose
8. Learn that whereas is one word
9. Whereas sometime is two (see under Be Concise)
10. Learn the difference between the present and past tense
11. Ensure pronouns are paired with nouns so we know who they are, man
12. Avoid random capitalisation

Because of this oddity.