I found that diet and exercise is the only best way to lose weight in a healthy way. If you're looking for something that doesn't require too much exercise, you may begin by reducing the amount of food you eat gradually, not all at once. But it is best to consult a doctor first, before jumping into any diet routines. If you happen to be fit/healthy enough to undergo a diet, you can try the Military diet (STRICTLY FOR 3 DAYS ONLY) just to boost the start of your diet.