When you're trying to lose weight by cutting back on calories, keeping your energy levels up can be a challenge. Many dieters fail at sticking with their diet plan because they simply feel too tired, depressed or lethargic after a few days. When your body isn't used to a lower calorie intake from your diet plan, you may experience a noticeable energy dip that makes it much harder to stick with your diet in the long-term; however, there are several ways you can raise your metabolism and enjoy an ...