That is the problem with Diet food anyways.
If you want to lose weight. Stop eating "Diet Food"
If you are going to indulge in something, you are better off in eating the non-Diet equivalent.
1. It will satisfy you more. You can have a piece of 300 calorie dessert and you will satisfied. Or you chow down on 4 or 5 100 calorie diet snacks.
2. Gives you energy. If you can get non-empty calories. You get more energy out of your day. So you can go out and get more active.
3. Too few calories, puts your body in starvation mode. This means it will slow your metabolism so when you do eat it will go to fat, because it won't known when you will eat again.
If you are going to have a Soda, I like real Cane sugar soda. It tastes better, and when you drink a potion you feel satisfied and you really don't want an other glass.
Diet Soda, sends your body mixed messages. So it thinks it has sugar but it doesn't so your body will try to process it. Leaving you feeling hungry.