I've always used a To Do list to manage my time. My downfall sometimes was taking the time to rewrite the list, and possibly reprioritize. Since I work at my computer most of the day, I decided to convert my TD List to a Word document. I keep that document open but minimized. When I complete a task it's easy to simply click on it, erase the completed task, and see what the next one is. This obviates the need to stop and rewrite the list. I also keep a modicum of a calendar in a second section of my TD list. Important events, which are usually associated with a task or some action on my part, are kept in chronological order. As these dates move closer it's easy to simply move them up into my TD list. Of course I keep a more detailed calendar in the normal fashion, but this method keeps my calendar synchronized with my TD list.