A tablespoon of mayonnaise has 100 calories. Salad dressing looks like mayonnaise, but has only half the calories. Put mayonnaise on your sandwiches. Put a lot of mayonnaise in tuna salad, egg salad, chicken salad, ham salad. Try it on a peanut butter sandwich.
Sour cream has a lot of calories, too.
Put sour cream on cooked vegetables such as potatoes, beans, carrots and squash. Top your bowl of chili, salad and soups with it. Add sour cream to casseroles. Dip raw vegetables into sour cream. Put it on top of fresh fruit with some sugar for dessert.