Efficiency
Here’s a great piece by Amory B. Lovins on efficiency and conservation:
Since the Arab oil embargo in 1973, the United States has gotten more new energy from efficiency than from all net expansions of domestic energy supplies put together.
The millions of little things people did to weatherize houses, get more efficient cars, upgrade office lighting, plug up steam leaks, etc., plus some shifts in economic structure, yielded four times as many additional Btus as did the net increase in supply from all new American oil and gas wells, coal mines and power plants built in the same period.
- more here