And before eating anything else, you should start by eating vegetables with low amount of energy, like cucumber, lettuce etc. And do it without pouring enormous amounts of fatty salad dressings on top of them.
And you should stop eating before your stomach is full. It is enough to eat as much to take away the hunger. And you should use small drinking glasses, plates etc, because it helps to keep the amount of food you eat lower.
And if this doesn't help, start calculating calories and changing the content of food and drinks to something that has less calories (and take smaller amounts of them). Laws of nature guarantee that you lose weight if you just cut enough the amount of calories you get from your food and drinks. It is just question of making this more pleasant, by choosing right kind of food, that helps take away your hunger without a lot of calories.