Losing weight isn't about going on a short-term "diet" and then forgetting everything you've learned during the process. In order to lose those extra pounds and then keep them off, you need to make some permanent lifestyle changes. This article contains some advice on what changes you should make to help you lose that weight.
The most important thing to remember for weight loss is to take in less calories than you're burning. You can accomplish this in one of two ways. You can either exercise more so that you burn off more calories, or you can change your diet so that you take in less calories. The best way to lose weight though is a combination of the two.
A good way to lose weight is to eat your meals at the dinner table instead of in front of the television. When you eat in front of the television you aren't aware of how much you're actually eating. When you eat at the dinner table you're more aware of how much you're eating.