Shoot against a contrasting background. For dark furniture, a light backdrop. For light furniture, a darker backdrop. The contrast makes segmentation easier.
Use diffuse lighting from above and the front. Avoid harsh shadows on the floor. If the piece has legs, a soft shadow under each leg is fine, but a large shadow to one side is a problem.
Shoot at a consistent angle. Most furniture is photographed at a slight angle to show depth. Three-quarter views work well.
If the piece is very large, consider photographing it in a studio with a seamless backdrop. This is the standard approach for furniture catalogs.