Most attempts to lose weight end in frustration, disappointment, self-condemnation and even weight gain. This is because people usually try to lose weight in ways that create the very stress and food cravings that ultimately defeat their weight-loss strategies. Successful weight control programs work with, rather than against, your body.
Beware of restrictive diets 
Food restriction may  affect the levels and regulation of important brain chemicals called neurotransmitters – messengers that allow nerve cells to communicate .They are involved in all aspects of nerve function, including processes that reach conscious awareness: remembering, thinking and feeling. Serotonin is one of the them. Many functions involve the release of serotonin: mood, sleep onset, pain sensitivity and blood pressure regulation. Many anti-depressant medications works by increasing serotonin levels in the brain. Similarly, carbohydrate intake increases brain serotonin  level, which may be why some people eat carbohydrate foods when they feel stressed. So what happens on restrictive diets? Couple verylow-calorie intake with restricted access to carbohydrates, and you get hunger combined with food cravings. No wonder such diets rarely work!
Work with our body Successful, long-term weight loss occurs as a byproduct of a balanced lifestyle. When you live your life in ways that reduce feelings of hunger, food cravings and emotional stress, you are more likely to achieve the biochemical wellbeing that enhances weight-control efforts.
Keep expectations positive but realistic. A balanced lifestyle does not mean lose a dramatic amount of weight in a short period time. Weight  loss will be slow, but it will be more likely to stay off.