Buy a scale. Record your weight. (e.g. 200.0lbs)
Week 1: you can eat anything you want in one sitting if the scale shows less than 200.0lbs
Week 2: you can eat anything you want in one sitting if the scale shows less than 199.9lbs (200.0-0.1)
Week 3: you can eat anything you want in one sitting if the scale shows less than 199.8lbs (199.9-0.1)
...
Week X: you can eat anything you want in one sitting if the scale shows less than (last week's goal - 0.1)
So losing a pound takes 10 weeks. Losing 10 pounds takes 100 weeks, etc.
The subtle part is that
(a) you can only eat when the scale says so which means that grabbing junk food gets ruled out unless the scale agrees.
(b) you don't feel "deprived" because you can anything you want in one sitting.
(c) you discover that eating junk food at your "one sitting" just means it will take longer before you can eat again.
(d) because you're SLOWLY changing your eating habits using external measurable control your body will lose weight and keep it off, gradually starving those fat cells.
(e) this is a "diet" in the sense of changing your eating habits, not in the current perverted meaning of trying to "diet" by "crashing" your weight loss.
Eventually you'll discover that if you skip anything containing high fructose corn syrup you tend to get to eat more frequently. That HFCS really hurts.