Incidentally, I joined the long list of comments on this post from Problogger last January 31. I included two more questions and here they are: 14.0 Did I make it readable? One good reason I like your posts is because you do not allow your readers suffer from bumping thier heads while they are reading. They have enough font size and has clear and white background.
15.0 Did I use common English words? The reality is not all readers are fluent in English and some of them has to get a dictionary just to understand what you want to say.
These 2 are mentioned in my post How to Post a Good Post
even before the great Darren Rowse made his post.