Working hard is an essential part of any job, regardless of what the role is. What does vary, however, is how hard work translates into productivity and efficiency.
As long as the modern world has functioned the way it does, people lived by the five-day work week. This has been the standard for most jobs, other than those that require odd hours or the covering of around-the-clock shifts.
However, the start of the 21st century brought with it some changed ideas about productivity. In 2007, Timothy Ferriss published a book called “The 4-Hour Work Week: Escape 9-5, Live Anywhere, and