Eat more vegetables and less garbage. I go with the 90% rule. If you’re eating the right things in the right quantities 9 out of 10 times, you’re probably going to be at a pretty healthy body fat percentage.
Eat like an adult. You don’t need desert every time you eat dinner.
This takes discipline.
I love the definition Jim Wendler gives: “Discipline is doing what you don’t want to do when you don’t want to do it.”