Pessimism can quietly drain your business. A simple mindset shift—’Yes, and’—can help teams stay positive and engaged. During college, a friend convinced me to take an improv comedy class. An introvert by nature, I was way out of my depth. On the first day, I was so nervous I thought I might faint. But I ended up loving it—and learning a lot. In addition to silly warm-ups to get rid of inhibitions (zip, zap, zop, anyone?), I discovered the magic of “Yes, and . . .”