At 2 a.m., most workers are asleep in their beds, blissfully unaware that their alarm clocks will sound in a few short hours. But for 41 percent of Americans this is the time of day is when they are most productive, according to a 2005 poll by the National Sleep Foundation. You can probably pick these folks out of your own office — they’re your co-workers who slouch into work, never a minute early but often several late, bleary-eyed and lackadaisical during the earlier part of the workday
