Only eat when your stomach is growling. People often eat out of boredom, habit or nervousness. If you only eat when your stomach is growling, you will only fill your stomach with food when it is needed. If you feel like you could eat anything you can reach for, chances are you really are hungry.
If you're trying to lose weight, your greatest enemy is going to be after dinner snacking. Try to keep your eating after dinner to a minimum. If you can't manage that, stick to healthy snacks like fat free popcorn, or fresh fruits and vegetables. Then work up slowly to having nothing after dinner at all.
Even though weight loss comes primarily from diet you will want to incorporate a good exercise plan into your life as well. This will help you to increase your caloric limits as well as tone up the flabbier parts of your body. It will also help greatly in the battle against loose skin.