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.
When you first get started on home interior decorating, it is a good idea to have at least some notion of the kind of color scheme you might like. That is not to say that you cant change your mind while you are working out a plan. It is much better to change at this stage than when you already have the paint on the walls.