The warning signs:
There are two general signs that a blog is heading toward extinction. The first is a declining frequency of posting, and the second is a proportional rise in the number of posts about the blog itself. These two don’t always go hand-in-hand; sometimes it’s just one or the other, sometimes you don’t get either warning sign. But when either of the two is spotted it’s reasonable to begin wondering how long that curious internet publication will continue to be updated.
(Hat tip: Deron Bauman)