Click here to view the article entitled: Twenty Common Mistakes Made by New or Inexperienced Project Managers By Harold Kerzner, Ph.D., PMP
Links to the above post by Dr. Harold Kerzner have been published in several places, but I wanted to share it here too for those that haven't seen it. This is an awesome document that will help both new and experience project managers.
I have a couple of Dr. Kerzner's books and they are all excellent. One of his best books is listed below: