Snack on pistachios.
Snacking goes awry when you shovel handfuls of food in your mouth without even realizing it. Eating in-shell pistachios (a low-calorie nut) may help you curb your vacuum-like instincts in two ways, according to studies published in the journal Appetite. First, digging those nuts out of their shells slows consumption (no shoveling here!) and can decrease your calorie consumption (from the nuts) by 41 percent.
Second, the pile of empty shells serves as visual cue to remind you how much you’ve eaten, thus making it more likely that you’ll stop when you’ve had your fill.