To ensure that good foods will be available when you need them, use the Sunday Ritual. This is performed by setting aside three hours every Sunday to write out your menu for the week, shop for the week, and prepare your meals for the week. Cook all the meat, chop all the vegetables, measure out all the yogurt and/or cottage cheese, and distribute all the powders. Have them ready and set aside so that you can grab them in the morning and bring them with you regardless of what your day holds in store for you.