DIY Power
If you're interested in alternative energy sources, check out the link above for more information on do it yourself energy plans. The most common techniques are solar and wind power, which can actually be set up in many residential environments.
The choice of how far you take it is up to you. Some people are looking for complete energy independence, while others are just looking to complete a smaller project and simply save money on their bills. Also interesting is that you can sell surplus power back to your electricity company!