It is the fourth of the Five-Stages of Mastering Workflow and is essential in order to keep your system updated and functional. You must review your lists with the required frequency to trust them and feel everything is under control.

This phase basically consists of:

1. Updating your entire organizational system weekly through the Weekly Review.
2. Reflecting from time to time on your higher horizons, through a Bigger Picture Review, to make sure you are on the right track.