It all depends on what you’re knowledgable in. If you’re writing about a specific craft that you’re well-versed in, your blog is used to educate your audience on useful tips and insights that you learned and used through your own experiences. For example, Copyblogger provides insight on publishing, writing, blogging, marketing, and so forth. Their product varies from WordPress themes and tools used within.
Lastly, it's worth noting that Smashwords provides free ISBNs. I'm not going to get into a full on discussion of ISBN, which is "a unique identifier" associated with your e-book, but most companies provide a free ISBN for your e-book or roll the price up into a package. Smashwords has a good quick guide to e-book ISBNs that you should take a look at.
Hey everyone! Just wanted to let you know about a site I came across called Bargain eBook Hunter. They showcase Kindle and Nook books that are free or cost up to $2.99. Right now through July 8, 2011, they're holding a contest to give away a FREE Kindle! Just pop on over to their site http://bargainebookhunter.com/ and click Giveaways for entry instructions.