I can answer this, since I have a friend who's been doing this for years: you boil the frog. He started by taking the second half of each Friday off, because i

I can answer this, since I have a friend who's been doing this for years: you boil the frog. He started by taking the second half of each Friday off, because it was easy to sell his superiors on it. During the next performance review he asked to have the whole Friday off, and was granted permission to do so. A while after that he moved his day off to Monday.