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

it pays to be particularly vigilant in the early days, and in the context of well-known stumbling blocks: tension with other people, social pressure, loneliness or boredom or anxiety, and—perhaps surprisingly—positive emotions, such as joy or excitement.