Americans typically eat too many calories at lunch and then many go sit at a desk all afternoon. An easy weight loss tip is to cut back on lunch. Instead of a heavy or fast-food lunch, eat something light but filling. (Are you aware of the number of calories in most fast food lunches? Many are well over 1,000 calories.) Here is a tip from weight loss experts: When possible, eat lunch before you become ravenous. Once you allow yourself to reach the ravenous stage you will automatically eat too much then probably feel miserable all afternoon.