Use small plates and bowls. People tend to serve themselves considerably less in small bowls than large bowls. Researchers theorized this was because of the Delboeuf illusion in which two circles of the same size are placed close to each other. One is surrounded by a large ring (think a large plate), and the other is surrounded by a smaller ring (think a small plate). This illusion makes the circle (i.e., our food) surrounded by the large ring appear smaller, so we end up serving ourselves too much.
Make sure your plate or bowl is a different color than your food. The color of your dishware matters. The bigger the difference between the food color and the plate color, the less likely participants were to over-serve themselves. You’re better off serving tomato soup in a white bowl, since you’re more likely to serve yourself too much if you serve it in a red bowl.
Match your tablecloth to your dishware. A third factor influencing our portion control is tablecloth color. When the tablecloth color matched the dishware color, participants dished themselves less food. Researchers hypothesized that this was because matching the tablecloth and the dishware helps eliminate the Delboeuf illusion’s effect (see trick number 1) by making the dishware (i.e., the outer circle of the Delboeuf illusion) less noticeable.
For snack attacks, choose 100-calorie packs. It turns out those individually packaged 100-calorie packs actually do the trick. A 2011 study published in Obesity found that participants ate 25.2 percent fewer calories when eating from 100-calorie snack packs than from larger bags of snacks. This strategy was particularly effective with overweight participants, who actually ate 54.1 percent less when given the 100-calorie packs.
Don’t eat in front of the computer or TV. The more distracted we are, the more we eat. Get away from your desk and take that lunch break somewhere else — you deserve the break anyway.