Great outlines - I'm planning on making a simple plywood cornice for over the sliding door and painting it black (chalkboard?) for some contrast in our too neutral kitchen/dining area. (Miami Drapery Design: Cornices)
Adding ribbon to customize drapery panels Idea for master panels - just on the inside edge though. And valance for master bath. I would not do the center pleat. Just the outside edges. And trim the edges as well as the bottom of the valance.