For complicated projects, you should have a "projects folder" that outlines all of the details of a project that you find helpful for you. If that includes detailed timelines and a projection of all next actions, that's fine. Your project "folder" could be a physical folder, a notebook, or just the notes section of attached to the project item on your project list in Outlook or your PDA, etc.. I think the general idea is simply not to clog up your next action list or your project lists with too much unactionable (or not next-actionable) stuff. In otherwords, keep those two lists as streamlined as you can and put the rest of the stuff hidden out of sight until you need it.