You may have the skills but if you can't convey your vision to your client and make them "see the light" of blogging and how it helps their business you will never sell anything and the only person who will want your help is your mother who needs help setting up the VCR (don't even bother explaining to them what a DVD is).
If you're looking for a good resource on how to align your expertise with your potential clients, sign up for the weekly newsletter on Rain Today. They have some great articles such as "How To Communicate The Value Of Your Services". In this article, John Doer explains the RAIN method of selling in which you develop a Rapport with a potential client, find out what their Aspirations and Afflictions are, what Impact your solution will have on their aspirations and afflictions, and finally making them understand the "New Reality" that their business will experience.
To get to the "New Reality" John suggests asking questions like "What do you want to have happen as a result of our work together?". These are great questions to consider that will help you generate new customers that will understand the importance of the service that you are providing and that service is the new medium of blogging - an easy concept for bloggers to get but much harder for the rest of the business world that is still stuck setting their VCRs.