fill a jar with dried lavender buds (or coffee beans) and nestle an unscented candle in its own holder in the center. The heat from the burning candle will warm up the lavender (or coffee beans) and make your entire room smell delicious. I love lavender !
DIY coffee-scented candles pour beans (the cheaper, the better) into a small glass jar; just leave a quarter-inch of space on the top, then nestle a vanilla tealight in snugly. smells like a fresh pot of vanilla coffee — even after the candles are out.