Up your fat intake. Make tasty, filling foods like cream cheese pancakes, steak with celeriac chips, egg mayo. Make nice warm comforting beef stews and add some broccoli and celeriac. Roast a whole chicken to pick at.
I plan my menus a week in advance. I'm much less likely to eat off plan if I know what the plan is! And don't have the wrong type of food in the house, if possible.