1. Good blogs have a voice. Who wrote this? What is their name? What can I figure out about who they are that they have never overtly told me? What’s their personality like and what do they have to contribute—even when it's "just" curation. What tics and foibles fascinate make me about this blog and the person who makes it? Most importantly: what obsesses this person?
I think the foundation of the success that Geek Force Five is seeing (as opposed to the limited success I found with previous blogs) is in its voice and the way that it very clearly reflects my obsessions. Most of the really good bloggers that I read are focused on just a couple of topics and have a very clear authorial voice. Most of the so-so bloggers I read could become great bloggers by narrowing their focus a bit more, and by being passionate about every sentence they publish.
Kottke quotes point #8 on Mann's list instead of #1, but we're both in agreement that Mann is offering the kind of advice that new/young/uncertain bloggers should be following.