If you're entertaining during the day, be sure to open all curtains and blinds to admit natural light that will make the room feel brighter and bigger. 

Decorating Tip

If you're entertaining during the day, be sure to open all curtains and blinds to admit natural light that will make the room feel brighter and bigger. For evenings, adding a few strategically placed mirrors to walls can help make a room appear larger — plus they give a delightful effect when they reflect twinkling holiday lights.

— Brandpoint