I saw myself in a photograph yesterday. This led to my decision to eat three-quarters of a salad for lunch today, and to tell myself quite falsely that I didn't really want the pasta quattro formaggi. This exercise of discipline was mitigated somewhat by my request to have anchovies on the salad. I probably didn't need an entire gram of sodium on top of the Caesar dressing.
Still, I suppose that looking at photographs of myself more often will prod me to make at least better dietary choices, even if it is not so much fun from a self-esteem point of view.