If you like cookies too much – to the extent you have trouble stopping yourself from eating them once you start – the way to take the power away from cookies is to eat them more often (in appropriate portions) and not try to "stay away from them." Apples likely have no "power" over you because you give yourself permission to eat an apple whenever you want. But cookies will have power over you if you routinely restrict them. By enjoying a cookie with every lunch, you'll start to want fewer cookies. They will lose their appeal and the cookie monster will peacefully rest in its cage.