Downsize your dinner plates

12. Downsize your dinner plates. Studies find that the less food put in front of you, the less food you’ll eat. Conversely, the more food in front of you, the more you’ll eat — regardless of how hungry you are. So instead of using regular dinner plates that range these days from 10-14 inches (making them look forlornly empty if they’re not heaped with food), serve your main course on salad plates (about 7-9 inches wide). The same goes for liquids. Instead of 16-ounce glasses and over-sized coffee mugs, return to the old days of 8-ounce glasses and 6-ounce coffee cups.