Kim du Toit relinked to this post. It contains a detailed list of things that you might want to have handy in case disaster strikes. For what it's worth, I have similar sundries around the house at all times. My wife thinks that I'm anal, and she's right, but that won't stop me from staying prepared. Providing for my family is my #1 priority. Okay, it's a tie with providing for them, but you know what I mean.
This little home-built wind turbine produces about 1.5 kW when a 16 mph breeze blows. The website includes step-by-step instructions on how to manufacture and install your own wind-powered generator, with tips found here and turbine selection criteria found here.
Oh, and make yourself a nifty, low-power solar generator yourself to power some small things around the house. Could be useful if you lose power during a storm, or if you're simply going to be off-grid for a while.