When many people go into the office, they start their day by chatting with some colleagues, checking their email, and surfing the net for a while. Then they start working on whatever project is due that day. Soon, however, they hear the sound of a new email arriving, which they promptly open, leading them to other tasks. Before they know it, the day is over and they still don’t have that project finished. This happens repeatedly, taking two days to complete a 30-minute task.