Darby Saxby, Assistant Professor of Psychology at USC, studied clutter in a home, and the effects on persons living there. Her research found that home clutter can affect a person's level of cortisol, the stress hormone. She told Real Simple magazine in the February 2016 issue (pg. 128) "One of the things that make people have a physiological stress response is feeling a sense of overload, and clutter is a nagging reminder of things that are left undone." From what I have seen from working with my clients, that is certainly true. It is like a weight is lifted as the clutter begins to clear and a calm enters your life as you complete each area. Give it a try and see if you agree.
Steph has been organizing for over ten years. Her simple tips here can help you get and keep organized and add calm to your life.