Another way to sabotage your weight loss efforts is by cutting out entire food groups. “A lot of times when people do these New Year's resolutions, they cut so much out that it’s something that they can’t sustain for any length of time," says Lemond. "The facts speak for themselves: You’re putting yourself at risk for a lot of nutrition deficiencies that have a lot of minor and major implications." The whole point of making a resolution in the first place is to implement healthier habits that will stick in the long term. Consume everything in moderation for healthier and more sustainable results.