I learned a long time ago that at work one should do as little as possible and look as busy as possible. I also learned many years ago that the graveyard is full of people that the world can't do without.  Somewhere in between is the place most of us fall. But a recent trend is disturbing. The number of American workers that are using the vacation time they have earned is declining. Here's the story.  Today's Q106.5 Morning Show Poll: Are you using your vacation days this year.