People believe many things related to weight loss. However there are certain principles which cannot be ignored.
Some people believe that...
... they can lose weight but still eat whatever they desire. While there are some plans that hint at this, the truth is that if you have an unhealthy diet, you will not lose weight, even if you exercise 8 to 10 hours a day. You cannot eat high sugar/high calorie food and lose weight. Your body just won't work that way. You need a balanced diet, you can eat some high sugar/high calorie foods but in MODERATION.
People believe that...
... skipping meals will help them to lose weight. Actually this can cause you to gain weight. When you consider this objectively it makes sense that skipping meals can work against you. When you skip a meal, your body thinks that a famine is occurring. This is part of our cultural heritage. When the body has an opportunity to eat again it overeats to compensate for the famine. Therefore you can actually gain weight by skipping a meal.
People believe that...
... if they eat at night they will gain weight. This can be true if they also eat during the day and their nighttime eating consists of those high sugar/high calorie foods. If you don't eat during the day, eating at night is just another way of getting nutrition into your body.
It doesn't matter when you eat it is what you eat that matters. Eat when you are hungry and do not overeat and you can lose weight.
People believe that...
... cutting calories will lead to weight loss. While this may be true if you are eating 5000 calories of high sugar/high calorie food; cutting calories can actually cause you to gain weight.
Again, this is due to the cultural memory of feast or famine. After a period of no food, when the body gets food it stores it as fat to prepare for the next famine. Cutting calories is a famine to your body.
People believe that...
... they are too fat to lose weight or that they need a drastic diet to lose weight. While being overweight or obese is becoming common in many parts of the world, the truth is that anyone can lose weight if they eat properly, exercise a little and change their lifestyle.
Anyone can do all of these no matter how overweight they are. The drastic diets do not work as you usually lose water and you can gain the weight back and more when you stop the diet.