Of course, the three-plus-one rule is just one of infinite ways to decorate a mantel. For some, more is more, and a mantel is the ideal place to proudly display a collection. Try organizing things symmetrically so your mantel feels balanced, but don't forget to layer and mix up height. A mantel display is a great opportunity to integrate new colors into your home decor too. Choose a favorite color that you weren't able to work into your home and highlight it in your mantel display. Try picking something that contrasts with your mantel, or paint your mantel to make your display stand out.