subject: All Day Energy, It's Possible [print this page] Water is the most important liquid you can drink since your body largely consists of water; if you become dehydrated, you will feel fatigued. The guideline is to drink half of your body weight in ounces. Another easy way to boost your energy level is to get away from your desk and take a brisk ten minute walk. If weather doesn't permit that, spend a few minutes climbing the stairs in your building.