A project journal is good for the handyperson who likes to keep track of things for an ongoing project. You can prioritize your efforts with a Gant chart, budget, build a materials list, document progress, and keep track of how each part of the project is going once underway.
You can add sketches, photos, and even keep track of part numbers for your local hardware store to make ordering easy. You can do project summaries by the day, the week, or the month to keep on top of things. The journal is a good way to keep a running diary of how each problem was overcome.