For me, the next logical step is to pick a furniture piece. Depending on the room it could be a couch, table, or set of chair. This also sets a "style" for the room. It could make the decor classic, retro, or country. This is a huge step in the overall direction of the feel of the room.
This larger piece for the room my also help determine the color scheme of the room. If it is a floral piece you can choose from the colors in the pattern. If it is a wood piece, like a coffee table, you may not be able to use it for helping in the color choices.
After you have choosen a theme or scheme for the room, you will want to decide what attributes the room will need for it's usefullness. A dining room needs to be ready to serve people at the table, a family room needs to be inviting and relaxing. Whatever the use of the room, things need to follow the usefullness of the room.
Many of our primitive decrotaing ideas come from a useful standpoint of the room. These items can be as simple as a primitive barn star or as useful as a horseshoe hooks.
