The Wall Street Journal has an article about blogs, written by 10 or so people. Some of it is good, some of it is bland and out-of-date, and you can just skip Tom Wolfe's piece (via Ed Cone).
Also, check out 55 Essential Articles Every Serious Blogger Should Read (which makes it the 56th such article?).
As always, take caution. A blog is no more and no less than a piece of technology - it is up to you to figure out how you are going to use it. So, go ahead and read those 55, but keep in mind that at least half of the 'advice' is not relevant or appropriate to you and your own blogging practices and goals. Sure, there are some experiences about things that (mostly) work and others that (mostly) don't work, but don't think of any of those as "rules" writ in stone. Use them, instead, as ideas that you can build on in your own way.
