Have you ever thought about what happens to your employees right before they get to work? Sometimes we all wake up on the wrong side of the bed and just find it hard to get our bearings. At other times, we might start out fine, but have a horrible commute or a screaming match with a teenager just before going to work. Paying attention to the morning moods of your employees can pay dividends. In my research with Steffanie Wilk, an associate professor at the Fisher College of Business at the Ohio State University, we found that this start-of-the-day mood can last longer than you might think—and have an important effect on job performance.