The key to losing points is perseverance and determination. Don't go on a hunger strike at first, you will be unbearable. You start by cutting off snacks and stick to it for a month and you will find yourself thin. After that, I slowly shortened the amount in the evening and knew that it was not dinner. Meanwhile, you'd better stand for half an hour after every meal. You can read books. Don't take the elevator upstairs, walk more. The next step is exercise. Running and skipping rope are good. You should believe that you can succeed and stick to it.