I know I've mentioned this site before but it definitely is worth a second look. Yesterday I was "floating" around the Internet links from different peoples sites and again ran across the site for Ask Harriette. This time what I found was a series of articles and free pdf's on a variety of topics running from photographing your work to professional guidelines. It's excellent. If in any way you are involved or considering being involved in art professionally you should check them out.
So here is my Redo of Harriette Berman's Link. Give her a click!