Tony Pierce of Busblog has a list of rules for Bloggers. While most of what Tony writes can be of questionable veracity, his analysis is usually spot on. And this list rocks!
My personal favorite, number 18.
before you hit Save as Draft or Publish Post, select all and copy your masterpiece. you are using a computer and the internet, shit can happen. no need to lose a good post.
I'm sure I break a number of the rules, but of course, that is what rules are for.