What is the hardest part of dieting?

Not knowing if you're doing it right? Of course there's the scale that would show you if you were losing weight.

But what if you're starving yourself, starving yourself, but not a single gram is coming off? 

The essential elements of dieting

• energy deficit.
  I mention it first because it is the oldest "suggestion" for weight loss. But as many people have experienced, calorie counting and restriction often doesn't get results. Despite starvation, weight is not lost.
• Nutrient composition.
  The main components of food are carbohydrates, fats, proteins, minerals, trace elements and vitamins. The first three play a role in energy production.
  If you have carbohydrates, your metabolism produces energy from carbohydrates. So if every meal contains some bread, cereals, potatoes, rice, you will never be able to convert it into fat burning. You take in 600 calories, yet you don't lose weight.... i.e. the basic requirement for weight loss is (intermittent) carbohydrate restriction.
• Timing.
  The most important condition leading to obesity is dietary abundance and continuous intake of food and energy many times a day. The fewer times you eat, the more efficient your metabolism is and the healthier your mitochondria are. They can switch quickly from sugar to fat burning and back again. An 8/16 hour fasting is beneficial - that is, you are allowed to eat (almost anything) between 8am and 4pm, followed by a 16 hour meal break.