Clean your house more frequently. Participate in sports, etc. Avoid key foods that make people fat . Eat lots of green vegetables . Use vegetables as snacks, as a salad before you start regular foods, as something to eat before going to bed, etc.
Green vegetables are very low in calories while high in water and fiber.
Plan your life to have fun and be busy. Bored people eat more food . Plan your life so you enjoy it. Have a purpose to your life and plan your days accordingly. Have hobbies, start a new career, create something.