Multitasking has become a virtue in modern business, but it may come at great cost. While the brain can focus on two tasks simultaneously by splitting labor between hemispheres, managing more than two tasks reduces efficiency as time is wasted in task switching. Regular interruptions cost the average knowledge worker over 2 hours per day and $588 billion annually for businesses. Creativity and innovation are higher when focusing on one task or collaborating with one person. Long-term stress from constant multitasking negatively impacts health and task engagement as stress is the number one reason for reduced productivity.