Sounds like you really enjoy food. That does make it more difficult, but you can try this approach: before you start eating, pause and remind yourself, you should actively enjoy every bite. If it's delicious, it deserves your attention.

Also, if possible, don't restrict _when_ you can eat -- you should eat when you're hungry. Just, if it's not mealtime, eat an apple or some carrots, or whatever healthy thing you think your body is craving.

One of the reasons so many people get obese in this culture is that the "clean your plate" and "don't eat between meals" mentalities that our parents drill into us from an early age make us lose touch with our bodies' nutritional needs. Most people, if they listen carefully and re-attune themselves, can figure out what sort of food would be best to snack on.

And that reminds me, coming back to the question of portion control... if you're at a restaurant and they put a big plate of food in front of you, remind yourself not just to enjoy the food, but to pay attention to when you feel sated, no longer hungry but not yet full. Maybe the leftovers will make a good lunch for tomorrow -- something to look forward to.