Here are some common problems to look out for:
1. Misspelled words - It's a good idea to spell-check a document, but it's not enough. A spell checker won't catch every error.
2. Wrong word used - This is why a spell checker isn't enough. A spell checker will only flag words it doesn't recognize. It can't tell if a legitimate word is used incorrectly. Some words commonly confused: accept, except; your, you're; then, than; there, their, they're; cite, site, sight; lay, lie; loose, loosen, lose. Also, look out for a missing "r" in the word "your." It's easy to overlook a sentence such as "Visit our Web site now to receive you free copy."
3. Grammar error - Again, if you know you're not a good writer, have someone else check your writing for grammatical errors. Mistakes make you look bad.
4. Punctuation error - This is another area where you'll benefit from a review by someone who knows their stuff. If you're determined to do it yourself, purchase a good grammar or style book. One of the most common punctuation problems: Too many stupid commas!
5. Vague or confusing statement - Make sure every sentence is crystal-clear. You don't want your promotional message to raise more questions than it answers.
6. Illogical statement - Read over what you have written slowly. At the end of each paragraph, ask yourself: "Did that make sense?" Rewrite so that it does.