Corner shelves, I love how you can use small corner space. I don't like a shelf facing only one side in the corner and a tall bookcase would eat up the space around.
To keep rain/debris off under deck space. Screw the fiberglass panels that form the under-deck roof to the purlins.
driftwood lamp installed in a wall - since it's all painted white it has a rustic-meets-modern feel (Diy Decoracion Casa)