When you go on a diet your body thinks it is being starved and starts to conserve energy and fluids. You feel tired. When the diet is over, most people return to their old eating habits. If you diet without making changes in your lifestyle, you will diet for the rest of your life. Drink 8 glasses of water a day.
Water helps the body to work more efficiently.
Eat a nice bowl of salad once a day choose salad you like, not what you think you should have. Have only one desert a day and make sure it is low fat, such as jelly, meringue, stewed fruit, custard made from skimmed milk, Fromage Frais. Don't try to make all of these changes at once in your lifestyle. Space them out and phase them in. Try to make just one small change every two weeks and all these changes will soon be part of your life.