3. You’ve fallen subject to fad diet ideas

Keeping a balanced view of all the food groups will help you have a big enough repertoire of healthy food choices to keep you motivated and interested longer.

“You can’t look at foods individually,” says Dayle Hayes, M.S., R.D., a nutrition consultant in Billings, Mont., and member of the Council for Women’s Nutrition Solutions. “Any time you eliminate whole food groups or foods that are a major part of your diet, you wipe out important nutrients.” For instance, if you dis dairy, you zap a great source of protein. If you turn your nose up at high-fat fish like salmon, sardines and herring, you eliminate a top source of omega-3 fatty acids.

“The ‘bad food list’ is one of the oldest gimmicks in the world of fad dieting,” adds Robyn Flipse, RD., a nutrition consultant in Ocean, N.J. “As long as people can blame certain foods or food combinations for their excess weight, they don’t have to tackle the bigger issues, like planning, shopping and preparing meals for themselves and doing some form of physical activity on a regular basis,” she says.