Avoid breaded foods. Chicken and fish are healthy staples in your diet when properly prepared. However, coat them with flour and bread crumbs and fry them in oil and you have a fattening feast in an instant. Fried chicken or fried fish sandwiches are higher in fat and calories - and that's before they're drenched in mayonnaise or tartar sauce. Instead go for grilled, broiled, steamed or baked.