Keep Fleas, Ants, and Roaches Out of Your Home For Good With These 12 Amazing, Simple Methods - InShapeToday
Free Energy From The Earth Plans
Here is a simple homemade AC unit that you can build in a just a few minutes. It cost me $20 and change, and it cools a room for a good couple of hours.
Japanese technique of preserving/antiquing wood
Candle electricity generator