Why this is called the linchpin of the whole system
David Allen, who popularized this practice as part of the Getting Things Done method, described the weekly review as the habit that holds the rest of the system together. Capturing and organizing tasks only stays useful if the resulting lists are revisited and kept accurate; without a regular review, even a well-built system slowly turns into a pile of outdated notes nobody trusts.
It works with any tool, not just GTD apps
This checklist does not require specialized software -- it works identically with a paper notebook, a plain notes app, or a dedicated task manager. What actually matters is protecting a consistent block of time each week (many people use a slow point like Friday afternoon or Sunday evening) and running through the same checklist rather than reviewing loosely.
Frequently Asked Questions
How long should a weekly review actually take?
It varies by how much is on your plate, but a common range is 30 minutes to an hour once the habit is established. It tends to take noticeably longer the first few times, since you're also cleaning up backlog rather than just maintaining an already-current system.
What happens if I skip a week?
One skipped review rarely causes serious harm, but skipping repeatedly is what causes a task system to gradually lose your trust -- stale items pile up, and you stop checking lists you no longer believe are accurate, which defeats the point of keeping them.