When it comes to eating right, willpower will only get you so far. That’s because most of us eat without any thought. If a bag of potato chips is on the counter, they’re gone before we even have time to think about it. It’s called mindless eating. Dr Brain Wansink is the director of the Food and Brand Lab at the prestigious Cornell University. He offers tips on how to change mindless eating by making small changes that can make a big difference