"Custom" window covering for large window using Sun Screen fabric from DIY center. Blocks the heat and rays from the sun, but not the view. Total cost: less than $15.
Built an Adobe Oven
who knew this existed??? WOW.....Tornado Body Dryer: Dry your entire body without a towel -- while still in your warm shower enclosure! Love this idea!
DIY solar heater made from soda cans. Should be enough heat for a green house.