Better Than Before: What I Learned About Making and Breaking Habits--to Sleep More, Quit Sugar, Procrastinate Less, and Generally Build a Happier Life

by Gretchen Rubin

The underbuyer thinks, “I don’t need to buy running shoes. These old tennis shoes will be fine.” The overbuyer thinks, “I need running shoes, and a spare pair, and a reflector vest, and a pedometer, and a book about avoiding injury.” Knowing our inclination to under- or overbuy can help us identify opportunities to buy, or not buy, to foster our healthy habits.