Welcome to Play Smart, a game-improvement column that drops every Monday, Wednesday and Friday from Game Improvement Editor Luke Kerr-Dineen to help raise your golf IQ and play smarter, better golf.

In the space of one week in April, four young, unarmed Americans were shot over simple, everyday mistakes: pulling into the wrong driveway, ringing the wrong doorbell, getting into the wrong car.

For some, a concession stand is a rewarding start-up business that does not require a large initial investment. Mobile concession trailers and stands set up in parking lots, street sides and other ...