When you always feel the lack of energy to complete your daily tasks, it may actually be something more than just the regular fatigue we feel after working long hours. Your [lack of energy] can actually be a symptom of something more serious, like dehydration for instance. If you are the type of person who does not drink water often, you should reconsider your habits. Dehydration can leave you feeling tired all the time. You should also consider the food you eat â?? if you often grab junk food, chips, and fast food to satisfy your hunger, then your body is most probably not getting the nutrition it needs. It is a common fact that undernourished people do not have enough energy to sustain them for the entire day, so consider eating healthy food or take a multivitamin supplement daily. You should also minimize caffeine, alcohol, and nicotine intake as these may perk you up for a little while, but when the effect wears off, youâ??re left feeling even more tired than before.