Keeping your desk organized, whether at home or in the office, can improve your concentration. Psychologist Iris Dohmen, who advises companies on issues including stress and time management, explains the benefits of a tidy workspace and reveals why she no longer uses post-its. Why does a tidy desk help me to work more effectively? Why does it reduce stress and increase well-being? Iris Dohmen: That has to do with organization and time management. If I’m well-organized, including at my desk, that brings down the stress level. In the office, an untidy workplace can lead to criticism from manager…