Also, cutting out 3 Square Meals a day and going to maybe 1 full meal and lots of smaller meals throughout the day. A sandwich here, banana there, etc... just enough to cure the craving and top off your energy. This will help you feel lighter, too. Not the bloated feeling after eating a full "American" meal.
It only takes a week or so and you will find yourself not finishing entrees at restaurants because you are filling up sooner.
This does become a pain in the butt sometimes. It's rare, but getting ridiculously hungry while sleeping has happened to me before. I'll have to get up and eat something in order to go back to sleep. But, that's a sign of my metabolism working.
Also, listen to your body. Don't eat if you don't feel the need to. Your activity levels change on a daily basis, so should your caloric intake. If your blood sugar is low and/or your stomach is growling then, yes, you are hungry. But, don't go eat a full Ruby Tuesday lunch with co-workers just because it's lunch time.