Ok everyone, I gotta say this is a really good list of things to do immediately after you install WordPress to make sure you get on the good foot. EVEN, if you create blogs for people you do most of these things already, but you might pick up a trick or tip or two.
If you are installing WordPress for the first time. Follow these instructions and you will not go wrong as far as the first key steps go. Some key plugins for dealing with spam and SEO. Great checklist to help you get started.