Eat more fat. Skip carbs almost entirely. Ketogenic diets avoiding insulin inducing foods hack your metabolism to burn only fat. I practice intermittent fasting as well (having an eating window of less than 6 hours per day). Both are good tools, one to hack the metabolism to reduce excess body fat, the other to limit food intake. To convince your body that you are not starving, eat a carb loaded meal once a week.

This has to be a life-long commitment. If you drop these, you will gain back the weight, sometimes even increase in weight.