He points to a five-employee web-design company as a case in point. About five years ago, the founder decided to bring on a partner with more sales savvy. But, when business didn’t roll in as quickly as he’d hoped, the founder stepped in and started calling on his own prospects—without telling anyone else. Soon, he was arranging for deals on the sly, often agreeing to lower-than-normal terms the partner learned about only later. Eventually, trust between the two eroded and the partnership dissolved.