We won't even discuss fat. Offset balance of rich versus light foods by going for more plain choices and using the mashed potatoes and stuffing to garnish, rather that scooping mounds of these carb and fat laden foods in the middle of your plate. Eat slowly and really enjoy each bite. Get involved in conversation instead of buzzing into an eating frenzy. Drink a couple glasses of water a half hour before you sit down to feast.
Water gives the filling of fullness and thus quells the appetite.
Help with dishes. Take the garbage out. Take a five minute stretch. Walk away from the table without refilling your plate. What fun would that be.