Try going to bed an hour or two earlier.
Try regular exercise. Just 15 -30 min a day will make a big difference to how u feel. You may feel tired at first, but as your body gets fit your energy will increase.
Try taking a multivitamin daily. Most of us don't get all the vitamins and minerals our bodies need from our regular fruit and vegetable deficient diets.
Try drinking more water. A lot of the time, our feelings of fatigue are linked to us being dehydrated.
Take a 15 minute nap. A 15-20 minute nap can revive u. Any longer than that though, you won't want to get up and you'll feel sleepy. Set a timer for 20 minutes!