Do you doze off at work? Have you been feeling sluggish and tired all the time? Lifestyle factors like consumption of alcohol and caffeine, poor sleep and nutrition are few main reasons for tiredness and fatigue. There are various foods which are known to fight fatigue and boost the energy. Pumpkin seeds and walnuts are rich in proteins, vitamins, omega-3 fatty acids and can fight symptoms of fatigue. Oatmeal and yoghurt are also good energy boosters. Watermelon is the best fruit in terms of water content and instant energy.