Worst Practices: Letting your system get so far out of date it dies, or feels like a major effort to bring it back to life. Telling yourself you don't have time to do a review. Setting up the Weekly Review as a recurring appointment on your Calendar, then not showing up to your own meeting (good way to erode trust in your commitments).
via davidco.com
Great point about the worst practices of a GTD Weekly Review. I am in the middle of my weekly review (first one in a while) and know exactly how bad practices can lead to a lack of trust in the system. My brain was spinning last night!