How about giving your dining room cabinets a new lease on life and paint them to accentuate the color of the room? Check at your local paint supply store or DIY store, as well as online for advice on how to paint unusual surfaces.
Use a mirror in order to create light and space in your dining room. Frame one in such a way that it creates a mock window. You could even use one by placing it behind some artistic belongings in order to highlight them from all sides.
If your dining room chairs are looking a little tired and dated, then cover them with slipcovers…why not try making some covers yourself? Why not purchase another tablecloth or two that matches the one you use for your table, and upholster them in this as well?
Finally, why not repaint the room? You do not need to do the whole room, just paint one or two walls with an accent color. Maybe go for a color which will accent all the various aspects of the room, and integrates well with any soft furnishings that you have.