It's the facets that give a diamond its sparkle and appeal. It's the same with your furniture business. Find different ways to appeal to your customers, to present your furniture, and to develop and sustain customer interest. You want to be different from all the other retailers out there, with your own personal look and image. You want to be unique and interesting.
Nothing is easier to ignore faster than a boring business.
If you really want to create more business for your store without spending huge amounts on additional advertising, maybe you could start with your current customer base. Think about what the function of your business is. The function of your business is not to make a profit. The goal of your business is to make a profit. The function of your furniture business is to create and maintain customers.