I've worked for a couple agencies and would like to do some side work. I know my craft but I haven't left the agency world - I'd like to know what many of you offer?

Would you offer consulting? If so, what would that entail? Something like a lawyer - you'd be on retainer to answer emails and SEO questions? Or charge per email/call?

What about reporting - that can get sticky when a client wants you to keep customizing reports or if you don't know the full functionality of their analytics package.

I've been thinking about just selling site analysis documents, keyword research, and content suggestions.