Via: Know Feng Shui
In classical feng shui applications, placing a mirror next to the dining table has been a popular cure for wealth and abundance as the mirror symbolically doubles the food on your table.
Because mirrors energetically duplicate what is in front of them, they can be used to reflect anything that you would love to see more of in your life: a collection of books, a favourite work of art or object, a bowl of fruit, a beautiful view, or some treasured photos. It is not good feng shui to reflect less inspiring items such as your garbage, your toilet, a pile of papers on your desk, or the laundry basket.
When you consciously duplicate what brings you joy, you magnify this energy in your home and in your life.