Take a look at some of the last few weeks worth of posts that other bloggers have written. Pick one that you have an opinion on, and actually respond on your own blog.
This can be you agreeing with their post or expanding on something they mentioned. Or, if you actually disagree with what they said and have information to back up your opinion, that may be one of the best things for your blog at this point.
Of course, any response needs to be respectful and professional. Don't make it a personal issue.
If you find a topic that you can actually take a stand on, one that you’re passionate about, your blog will begin to take on more of your personality. This will make it much more interesting for your readers, and more likely to attract new readers as well.
More About the Book
The book also has bonuses for this week to help you write. Each week includes some or all of these: Example Titles, Brainstorming, To-Do, and Resource Links.