A high fat low carb diet works the best for us; we do a half-assed Keto thing, cut out most of the bread and sugar, but still eat some carbs now and then like on burger buns and toast at breakfast; we eat steamed veggies and a piece of chicken or steak with no bread a lot of meals we make at home, and avoid rice and cereals and potatoes, and substitute onion rings for fries at the burger joints. No soft drinks, except maybe sugar and caffeine free ginger ale and root beer, but mostly water.
If you have a uncontrollable sweet tooth, Russell Stover makes a few kinds of chocolate candy with Stevia instead of sugar. I like their almond bar and dark Pecan Delight. They also have some peanut butter cup and coconut stuff as well. It's still high calorie, so don't get too addicted.
