Research has shown that a power nap -- a sleep episode lasting 10 to 30 minutes -- can boost alertness and mood. Even a doze lasting just six minutes can mean a profound increase in declarative memory performance, according to a 2008 Journal of Sleep Research study. But if you want to brave the desk snooze, first get your boss on board. "Tell him or her, 'If I'm giving 110 percent and I'm taking 15 minutes just to close my eyes, shouldn't that be more accepted than solitaire?'" says veteran office napper Ronit Rogoszinski, CFP, a wealth advisor at Arch Financial Group, in Garden City, N.Y. Here's her technique for a proper snooze.