2. Thou shalt have no other blogs before me. We all love reading blogs—we wouldn't be here if we didn't—but yours comes first. Write your own posts before you spend all afternoon reading someone else's.
3. Thou shalt not make of thyself an idol. Keep your ego in check; you always want to portray yourself positively in your blog. Your reputation is all you've got in this business, and if you earn yourself one as a likable person as well as a great writer, you're
4. Remember thy Schedule and keep it, wholly. You don't have to write a post every day, but keeping a regular schedule is a courtesy and a sort of unwritten contract between you and your readers; they'll know when to expect new content and will come to appreciate and respect you for that.
5. Thou shalt honor thy agent and thy publisher. You couldn't have done this without them. Give props where props are due.
6. Thou shalt not commit character assassination. Everyone has authors or critics they don't like, sometimes personally. Don't pull an Alice Hoffman. And, I guess, don't try to kill anyone in real life, either.
7. Thou shalt not commit adultery, but thou shalt pimp thyself. No one sells you like you do. Facebook, Twitter, &c. The more pervasive your presence, the more likely it is that people will buy your book.
8. Thou shalt not plagiarize. Always quote. Always cite your sources. Always link back to them if they're on-line.
9. Thou shalt not deceive thy audience. Never post anything you don't believe is true, and be sure to provide links to any research you've done. Always be sure to clarify whether a point you're making is an opinion or a fact.
10. Thou shalt monetize. I don't do it because I don't consider blogging a part of my livelihood, but you, as authors, should consider self-promotion as part of the job. Let Google or whomever run a few relevant ads on your blog and make a little cash on the side. (Unless you've got a large readership, though, it probably won't be much.)