How to deal with difficult SEO clients?

[Kevin Newcomb]

There's no such thing as the perfect SEO client, but everyone knows that some are more difficult than others. Shari Thurow describes three of the more challenging clients in her ClickZ column today: Web Developers and Other IT Staff, Journalists and PR Professionals, and Decision Makers.

What kinds of clients do you have the most trouble working with? What's your best strategy for bringing them over to your side?