Walk a dog. If you don't have one find a neighbor who cannot and help.
Help a neighbor with gardening.
Get rid of the car, bike or walk.
Backpack shop daily, or on way home from work walking or cycling.
Replace high calorie density foods like processed meat with low density foods like fruit or vegetables. These fill the belly and give something else for your mouth to do.
Avoid alcohol, and sugary drinks.
Learn a new skill, it helps keep the mind occupied. A really good one is Einstein General Relatively, followed by Inflation Theory. Or a new language. Or a musical instrument.
Overall these will lower weight, and remove many of the causes of overweight like bad diet, depression, and have long term physical and mental health.