Just can't get details of a bad financial move out of your head? A new study from the Rotman School of Management suggests you might want to stick something related to your disappointment in a box or envelope if you want to feel better.

In four separate experiments researchers found that the physical act of enclosing materials related to an unpleasant experience, such as a written recollection about it, improved people's negative feelings towards the event and created psychological closure.

Source: University of Toronto's Rotman School of Business