Choose foods that have a high water content (fruits, vegetables, low-fat milk, cooked grains, lean meats, poultry, fish, beans) to increase satisfaction.
My favorite example is to compare two sandwiches, one with 4-5 oz sliced turkey and 1 oz cheese; one with 2-3 oz sliced turkey, a sliced tomato, 1 cup of fresh spinach, and 1 cup of sprouts. The sandwich with less protein and filled with veggies has less calories, more volume and will be more satisfying. Enjoy!
A great book to read on this subject is "The Volumetrics Weight Control Plan: Feel Full on Fewer Calories" by Barbara Rolls and Robert A Barnett (2000)