Myth: Coffee before a nap will keep me up.
Fact: There is such a thing as a caffeine nap - affectionately referred to as the nappuccino. To do it right, enjoy that cup of coffee or tea, and then take your nap. As you sleep, the caffeine will begin to kick in (it reaches peak effectiveness about 30 minutes after you drink it), so that when you wake, you'll be feeling your most refreshed.
Read more at: http://indiatoday.intoday.in/story/noon-nap-myths-caffeine-nap/1/404984.html