Measuring weight loss progress doesn't only mean counting how many pounds you've lost.
Yes, the goal is to lose the weight. But if you focus only on the scale, you may miss some valid signs that you are really getting there.
The things to measure and concentrate on are your behavior, your old habits, if and how both are changing. Because once old eating habits begin to change, once that usual eating behavior of yours goes into transition, weight loss is bound to follow.
Keep a chart. Begin by identifying ways you act that you think most contribute to your being overweight.
Make a good plan for changing every one of those behaviors.
Take note of how well you are sticking to the plans.
This will tell you whether or not you are really on your way to goal.
excerpt from Psych Your Diet: A Daily Dose. Volume 2. Psych Yourself to Stick to It. by Kenneth Schwarz PhD and Julie North Schwarz. Symmetry Press.