Concentrate just at the tip of your nose where the breath touches the tip leaving the body, when your breath in, think “in”, when you breath out, think “out”. Determine to keep you mind at that, but be relaxed while doing it. Works well when you are already tired, i.e. at the time that you usually go to sleep.
This is like, thought replacement. It’s a “Buddhist” technique.
Eat them before you eat anything else. When you are hungry, foods tend to taste better, and your body is not trying to tell you to stop eating yet.