For me, the scale is a source of accountability. Knowing I step on it every day is one thing that keeps me on track. Like others, I've conditioned myself to understand weight fluctuations. I calculate my "weight lost" once a week and for the most part, it is continuously down. Day to day shows me what makes me retain water (for me, it's typically not drinking enough the day before) or what makes me feel bloated.

While it is most certainly NOT the only tool....for me, it is a useful one.