Diet is very important when trying to lose weight. One of the best ways to watch your diet is to eat what is healthy for 6 days, and then one the 7th day, don't worry about being on a diet. Allow yourself to have the food that you craved but couldn't have all week.
To keep from being discouraged, set reasonable weight loss goals. Often, people want to see big results fast, and give up when they don't. Aim to lose about one to two pounds a week. It's a goal most should be able to hit easily. It may seem like slow going, but those pounds add up fast and losing weight the right way will help you keep the pounds off.