One important thing to keep in mind as you market your work is to set realistic achievable goals for yourself. Having a "pie in the sky" dream is great, but make sure that you have a realistic plan for getting there.
I've worked with authors who when I first talk with them want to know when I'll get their book on Oprah. (Hmmmm. How do I respond to that?) I'm not saying that I don't think the book deserve's Oprah's attention. I'm not even saying that the book won't eventually get on Oprah. But, there is probably a better place to begin publicity efforts such as local TV and radio, blogs related to your topic, and relevant periodicals. By actively approaching these venues an author is more likely to gain the attention of national media.
Bottom line: start with realistic and achievable promotional ideas and build from there. Your efforts will help you gain more success and should lead to better and better opportunities.