I wonder if you are trying to incorporate too much into your notebook. If you follow the methodology in the GTD book I think you would wind up with a notebook with one section for a calendar, one for telephone/address information, one for your "next actions" lists separated by context, and one for a list of your projects, an "agenda" list and maybe a few other things. Most everything else will be in your general reference files or project files and not carried with you regularly. Your notebook may have a few sections for your most important projects. It will also be a good capture tool for information that will be channeled into your filing system. But if you try to put your whole GTD system into a single notebook, I think you will have problems with that.