365 days. 5 years. 1,825 moments captured. In her best-selling book "The Happiness Project," Gretchen Rubin discovers the pleasure of writing just one sentence every day. "The Happiness Project One-Sentence Journal "helps you to make a fascinating and revealing time capsule of the next five years of your life. Simply turn to today s date, reflect on the quote at the top of the page, and jot down just one sentence (perhaps about something good that happened that day). This daily ritual is highly do-able and provides a striking sense of accomplishment, and as the years go by you can see how your entries evolve."