Decorative wall shelves can be bought already put together. This sort of package includes the top of the shelf, the brackets, and even matching screws. Buying shelving like this is probably the most popular way to go. These pre-packaged decorative wall shelves are simple and leave no room for error. Just check some of them out at your neighborhood hardware or home improvement store, you may be pleasantly surprised with how easy they are to install.
With standing structures, there is much more room for uniqueness. They have a large base upon which there is plenty of room to decorate. They also leave room on tabletops so that the decorator has more surfaces to work with for picture frames and trinkets. There is also not the burden of worrying if a table is sturdy enough to support the decoration.