"If you hate having to burn off those extra calories, don't put them in your body in the first place."
By having a rough idea of what burning off off (say) 300 Calories takes in physical exercise, and what the Calorie-content of your foods are, you'll find it easier think of what you're eating in terms of hard work. A sushi roll is roughly 200 Calories, or 30 minutes hard work.
The choice then becomes - "Would you rather have that sushi roll? Or would you rather have to work out strenuously for 30 minutes? Choose now!"