Feeling sleepy? Why not have a cup of coffee? A power nap? Or how about both? The process may seem counter-intuitive, but according to some studies, grabbing a quick cup of joe just before a 20-minute snooze is one of the most effective ways to fight off grogginess during the day. So if your eyelids are feeling heavy at work, take some time out of your lunch-hour for this daytime energy boost. Watch the video below to find out more.