David Allen, the creator of the Getting Things Done workflow, says if you're not doing a weekly review, you're not really following GTD.
To start reviewing your tasks every week, use this simple checklist template. There are steps for before, during and after the review, and a recurring task so you always remember to review your tasks every Friday (or whatever day works for you best).
And remember, if you forget a week, don’t give up: Persistence is the key to getting things done.
Tip: Keep track of your task's status by adding labels like Next Actions (@next), Waiting For (@waiting), and Pending (@pending).