Good time management means quality work rather than quantity. Our long hours culture is a well known cause of workplace illness. You have to get a work life balance that suits you, says Professor Cooper. Working smarter means prioritising your work, concentrating on the tasks that will make a real difference to your work. Leave the least important tasks to last, says Cooper. Accept that your in tray will always be full. Dont expect it to be empty at the end of the day.