9. Run the other way if: the
SEO firm(s) won't disclose their methodology, nor provide reports tracking their services to you.
10. Sprint the other way if: the
SEO firm(s) won't disclose or is not able to tell you exactly where your money is going every second of every day.
11. And this stuff too, of course!
Webmaster Help Center - What's an SEO? Does Google recommend working with companies that offer to make my site Google-friendly?
~D