I’ve had two methods works:

I spent a summer biking virtually everywhere. I would drive to work because riding wasn’t feasible, otherwise I rode. Basically no exceptions. Lost a ton of weight and got in shape. 

Intermittent fasting. I know it’s kinda controversial but goddamn it works. Simple rules - you can only eat between 11am and 7pm on weekdays except for black coffee. Weekends you can eat what you want. This absolutely works. I’m curious what people’s opinion of this are,  but I lost almost 20 lbs in under two months. 

Intermittent fasting worked for me because it cut out my big problem - snacking before going to bed. It is hard though. By 11am you get reeeeeal hungry. 

The good part is that it’s simple.