Don’t nosh mindlessly.
When you’re hungry, prepare yourself something to eat: put it on a plate, put it on the table with a napkin and some cutlery (if applicable) and a drink.
Sit down like a mentch and take a moment to think what you’re going to eat and how grateful you are to have it.
Don’t tell me you have no time; you don’t need to do this more than three times a day. And each time (excluding cooking or actual food preparation) you’re spending 3-4 minutes (max.) on this. Even if you eat 5 times a day, 15 minutes carved out of your schedule should be adequate.