While I still use and believe in most of the concepts of GTD, I think Bill has an elegant solution here. Especially with the way he uses his notebook to set up his daily tasks (be sure to check out this example on Flickr). Here was something I could incorporate into my workflow. Bill uses a master list, in the back of his notebook. Mine is simply kept in Things. But I could see how his idea of including personal and work related tasks on the same page, as well as a timeline when things break down, could really work for me.