Fold newspaper pages to the size of various cabinetry pieces, appliances and furniture, and then move the pages around within the space. This is a perfect way to determine just how big a center island would be in your kitchen, or how big a new built-in wall cabinet and bookcases in your family room should be.
If existing cabinetry is already in place, you may have to improvise a bit. Both tape and newspaper can be used to outline new cabinets, appliances or furniture pieces, helping you visualize your new space.