You've probably heard someone say that the definition of insanity is continuing to do something over and over, even though you're getting zero results. So it follows that the definition of weight-loss insanity is to stick to a diet or exercise plan that hasn't nudged the scale much or has left you with physical or psychological side effects. Come on, that's no way to go through each day. Losing weight is a pretty individual thing, and there is a plan out there that will do the trick for you. If any of these six signs sound familiar, it's time to jump ship and find it.

1. You Have Zero Energy No diet should leave you feeling totally drained. The right plan will make you feel the opposite—energized and healthy.

2. Three Words: Major Digestive Issues If you find yourself constipated, cramping, or have loose stools, you may be missing some key nutrients. Or it could be that the food your diet consists of just doesn't agree with your system. Trust us—weight loss is not worth suffering (and ongoing chronic GI issues could lead to a larger health problem).

3. You Start Experiencing Anxiety and/or Depression Any successful meal plan should make you feel empowered and in control, not worried about every food selection. If you're feeling constantly stressed about your eating plan, consider it a clue that you'd do better on a diet with more flexibility.

4. You're Starving All Day Long A little hunger is normal when you eat less than you're used to. But if your appetite is out of control all the time, your plan is way too restrictive for you—and you're practically guaranteed to binge.

5. You Can't Wait for Your Diet to End

It's a bad sign if you resent your food and workout guidelines so much that you're marking off the days on your calendar until you can ditch them for good. Plus, any diet designed to be followed for a short amount of time is doomed to fail since getting to and then maintaining a healthy weight requires a more permanent shift in your eating habits, not temporary calorie counting.

6. You Just Aren't Losing Weight True, not everyone drops pounds at the same pace. But if you've been on the plan for two or three weeks and the number on the scale is the same, a different way of eating would probably be a better fit.