Effortless. Many people try to stick to a new diet through sheer force of will. Even when this works, it tends to be a poor allocation of resources. It’s better to do an upstream intervention, such as emptying your house of unacceptable foods and stocking the kitchen with easy-to-grab items from the new diet. Generally speaking, beware systems that require either ongoing discipline or continuous decision-making, and instead look for places where a single burst of willpower or effort can create savings down the line.