There are many guides and links available on the net about how to self-publish.  As a writer, you are probably more interested in doing what it is you do: write.  Synthetic Press Publishing offers comprehensive services for publishing and managing your publications.

As an electronic publisher, Syntheticpress.com provides comprehensive services for publishing and managing your eBooks:

• ePub creation including validated formatting for eBook, iBook, Kindle, Flipbooks for websites and other ePub platforms
• complete MicroSite management of your ePubs through website, social media networking, and developing technologies
• full eCommerce packages and management dedicated to the sales of your product
• sales accounts with Amazon, Barnes and Noble, and other competitive eShops
• staff dedicated to content management, sales, media presence and regular updates