The fastest, cheapest way to make the biggest impact on the available domestic energy supply is through energy efficiency.
Closing the efficiency gap between available and cost-effective options and the wasteful way energy is presently used will not only reduce the pressure on world resources; it will also save money, an estimated $2-to-$4 for every dollar spent.
Energy Efficiency on the World Stage
Depending on your point of view, this post is a little on the dramatic side for our liking. However, it does raise some interesting points and shows that energy efficiency is a measure that can be taken now and will save money - it's an important point, and makes the arguments over anthropogenic global warming completely irrelevant.
Energy efficiency saves money.