You spend nearly a third of your life in bed. But is the way you make your bed supporting your comfort, your health, and the longevity of your mattress? We all know how to make our beds ... kind of.

The idea of using a duvet is appealing because, unlike comforters, most duvet covers can be easily slid off the insert and cleaned in standard-sized washers. Putting the cover back on, however? Well, ...