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

Lord Kelvin’s observation, overbroad but nevertheless thought-provoking: “When you cannot express it in number, your knowledge is of a meager and unsatisfactory kind.” If we want something to count in our lives, we should figure out a way to count it.