Having a laugh

The Economist reports that Having a laugh at work is very important if you want to hang onto great employees and increase productivity:

"The best bet may be to hire people with a sense of humour. That was the philosophy of Herb Kelleher, the legendary boss of Southwest Airlines, an airline that is actually a pleasure to fly. One of his staff delivers one of the better and curiously timely lines, “We’re sorry for the delay, but our automated bag smasher is broken and we are having to break your bags by hand.”