(1) Grab a smaller plate, 8", and a smaller bowl, 1-1 1/2 cup, next time you eat a meal!
(2) Don't put the serving bowls on the table, leave them on the stove/counter OR better yet, serve up the meal and put away the food.
Consider this also after an evening meal...
(3) Make to-go plates of leftovers for the next days lunches or for the freezers so meals will be ready for days you just don't know what to fix.
(4) Turn off electronics at mealtime.
(5) Plan an after mealtime activity as a couple or as a family like a walk around the block, tennis at the park or chalk on the sidewalk.
Try it...post pictures...