If you are dining out: Share a meal, split dessert, avoid fried foods and cream sauces. Take home leftovers to have the next day.
At home: Only make as much as you will eat at one meal. Remember to fill your plate with 1/2 fruits and vegetables; 1/4 meat and 1/4 starch. Make a cup of tea or other favorite beverage to have after you are done so you are less tempted to overeat. If making dessert, make 1/2 the recipe so there won't be extra hanging around. Stop yourself before taking an extra serving and ask yourself if you are hungry of if you are eating it because it is there.