There are a lot of common questions pertaining to the business end of SEO. Below are some of the ones I find particularly helpful. The "Let your trusted SEO do their job" article was written 4 years ago and couldn't be more true today.
Related Links and Resources
Are You Ready To Hire a Search Engine Optimization Firm?
How to Avoid a Bad Client and How Not to Be One...
How to Price an SEO Campaign
Let Your Trusted SEO Do Their Job
Seeking a Search Engine Optimization Company? You Better Shop Around!