(Personally tested and recommended by the author of this web. Some links might lead to other websites.)
Please find here reviews or procrastination, productivity and time management related books. I am thinking over how to extend the functionality so that visitors to this web can add their own book reviews as well. At the moment, it is possible to leave comments for the books that are already reviewed. You can also use the feedback form to send your review for publishing, or to request other books to be added. Discussion forum on this web is another place to leave your comments and reviews.