Friday while reading Gizmodo, I saw an interesting idea. Curtains that double as solar panels. You close the curtains since you want to block the sunlight from the room, but why not make that curtain more functional? Embed tiny solar panels in the fabric and put them to work while keeping your house cool.
Some day when I own a house and have some spare cash, I would like to set up some sort of green energy collection. I am thinking solar panels and battery storage. Maybe a small wind turbine. There are lots of options there.