How to make "pico-hydroelectric" power - doesn't require a lot of water and generates enough power for at least one household. I was thinking something like this in-line with your water inlet system since it is already under pressure.
DIY Solar Lamp: Make your own Eco-Friendly Sun Jar. This is simply a way of taking an existing solar lamp ( garden stake style) and gluing it (solar panel skyward) inside a sealable jar. Soak up sun outside in the day, use indoors at night!
Gerber GDC Money Clip
Gerber GDC Money Clip - edc everyday carry money clip with knife
Great little backpack by Hill People Gear, the military style Tarahumara Pack is perfect for outdoor adventures when not carrying a lot of gear. If you are going to carry a lot of gear the bag can easily be attached on the back of a larger backpack