warm lighting, artwork on wall
hanging logs from ceiling
painted ceiling in dining room? wedgewood blue?
1. Strategically place tall potted plants. Fill vertical height in rooms with tall ceilings or fill bare, lonely corners with potted trees. As long as your space gets enough light to support the plant's needs (check with your garden store for instructions and recommendations), you really can't go wrong with adding a massive houseplant.
turn bottles into a chandelier