For me its more about becoming self aware so if I feel the urge to snack (In my case on nuts) I am managing to tell myself no! However it has come to my attention how much I go to snack at other times of day which I didn't realise I was doing. I tend to think because its low carb foods its ok, but now I am consciously trying to not eat anything between meals at all. Pretty hard for me as my motivation has weakened recently, plus I have a lifetime habit to combat.
Can I encourage you not to give up, at least you are identifying that your work/life balance can be challenging. Keep trying and when you can, keep to the schedule, it will pay benefits.