" Tracking anything is better than tracking nothing. If you are very overweight, very weak, very inflexible, or very anything negative, tracking even a mediocre variable will help you develop awareness that leads to the right behavioral changes. This underscores an encouraging lesson: you don’t have to get it all right. You just have to be crystal clear on a few concepts. "

― Timothy Ferriss , The 4-Hour Body: An Uncommon Guide to Rapid Fat-Loss, Incredible Sex, and Becoming Superhuman