Be careful not to under-eat too. I always had trouble sticking to a diet because the points pr calories or whatever would freak me out, so I would under-eat during the day in order to 'save' calories in case I needed them later. The result was that I became starving at about 4 pm and did not stop being starving for the rest of the night. I could stick with the diet for a few days, but then I would go out or something and that would be that.
I read a great book that suggested having 3-4 meals a day of 400 calories---no less. They presented some scientific mumbo-jumbo about how 400 calories was the optimal amount to eat at one sitting. I have given it a try, and it's working. It was a struggle to get in 400 calories at breakfast (I am not a huge breakfast eater) but I have been planning carefully and getting in 3 proper meals (400 calorie) and 2 200-calorie snacks. Some of the meals/snacks have not been the healthiest food, but as long as I stick to the calorie goal, I am on plan---so going out for coffee with Dad and having a cookie is allowed, without breaking the diet, which is great! So far, 1 pound down but I haven't been exercising. So that should speed things up a little when I do.