Want to lose that belly fat once and for all? Give up these 6 things  ...

1. Diet soda
Research shows that diet soda drinkers take in more total calories throughout the day than those who don't drink diet soda. 

2. Eating out too much
You have better control of what you eat when you eat at home.

3. Staying up late on weekends
Research from Northwestern University shows that staying up late and then sleeping late the next day leads  to weight gain −  because you tend to make poorer food choices. If possible, try to keep to your weekday sleeping and rising schedule.

4. Fighting stress with sugar
A Harvard study found that stress increases cortisol levels in the body, which leads to cravings for sugary and fatty foods.

5. Cardio only
Don't just spend endless hours on the treadmill or elliptical. You need to incorporate strength training to burn fat. Pick up some weights!

6. Smoking
According to a study in the American Journal of Clinical Nutrition, smokers have larger waists than nonsmokers due to more  belly fat and less muscle mass.