A short nap in the middle of the day can reduce stress and invigorate you for the remainder of the day.
Quick napping for 10 to 30 minutes a day can relieve stress on your heart and increase your effectiveness at the office.
Of course, it’s not always possible to nap at work. But no one will miss you if you sneak off to the ladies room for a few minutes. Close your eyes for 5 quiet minutes and try meditating as a substitute.
Instead of reaching for a midday coffee, try the oppositie approach. Shut down for a few.
Grace Magazine 
A power-nap is a short sleep which terminates before the occurrence of deep sleep or Slow-Wave-Sleep (SWS), intended to quickly revitalize the subject from drowsiness. In our modern society, napping is often mocked and taunted, as it is associated with a lazy attitude. Power napping is thought by many to maximize the benefits of sleep versus time. People who regularly take power-naps may develop a good idea of what duration works best for them, as well what tools, environment, position, and associated factors help induce the best results.
Pingback: » Stress Release: Power Napping