A friend of mine recommended I should read David Allen's book "Getting Things DONE". So I went to the Barnes and Noble bookstore and picked up a copy. I already have a copy of Stephen Covey's "The 7 Habits of Highly Effective People". I feel Covey communicates the underpinnings of personal productivity much more eloquently than David Allen.
However, one of the striking similarities in both approaches is their emphasis on the weekly review.
Fast Company published an interesting piece of David Allen.