If you’re eating at a restaurant this weekend, chances are the portions they serve you will be too big. Deciding in advance how much you’re going to eat (before you put a bite of food in your mouth) and saving the rest to bring home for another meal the next day is such a win/win/win. Doing so means you get to eat a reasonable amount of calories and stay on track, it means you get to enjoy the good restaurant food twice, and it means you get to save money because you get two meals for the price of one.