The author's approach is brilliant in that it exists at a layer above the productivity tools and techniques themselves, to check if they're being employed effec

The author's approach is brilliant in that it exists at a layer above the productivity tools and techniques themselves, to check if they're being employed effectively (if at all). I can also relate to his experience. Momentum is everything. Getting into a productive state is hard, and once you start losing momentum, the deceleration tends to snowball. Next thing you know, you have no momentum, and depression is there waiting to pick you apart like a vulture. Becoming productive again is now harder because you're depressed from not being productive. It's a vicious cycle that feeds into itself.