The beauty of a systems approach is that it takes vastly less willpower. It is very counter-intuitive to most people: "Gee, doing that every day, that sounds so hard. I can barely get exercise twice a week; therefore exercising every single day must be much harder." Nope. Quite the opposite.

Hard is deciding every day whether you feel like going for a walk by arguing with yourself over whether you will feel better afterwards. That is effort spent with no satisfying payoff.