In a Cornell University study published in PLoS One, researchers observed people at two separate breakfast buffet lines that featured the same seven items: cheesy eggs, potatoes, bacon, cinnamon rolls, low-fat granola, low-fat yogurt, and fruit. One line presented the foods from healthiest to least-healthy, while the other line had the order reversed. Regardless of which line they passed through, more than 75% of diners put the first food they saw on their plates; the first three foods they encountered in the buffet made up two-thirds of all the foods they added to their plate. So take a stroll around the buffet or dinner table before you serve yourself, suggests Young.