Thursday Think Tip: All-or-nothing simply doesn’t work. When people are all-or-nothing about being on a diet – believing they are either totally perfect on their diet or totally off of it – it makes it much more likely that one mistake will spiral into more. When they are all-or-nothing about food – believing that there are some foods they should cut out entirely when they’re dieting – it makes it much more likely that once they start eating a “bad” food, they won’t be able to stop, because they’ll have the thought, “I don’t know when I’ll allow myself to eat this food again, so I better eat as much of it as I can right now.”