In addition to not showering and not cooking my food, I save energy by using only large denomination bills.
A $20 bill has 20 times the purchasing power of $1 bills, yet uses only the same amount of paper and energy to produce.
also:
Crush a Third World economic development movement: One of the most pressing threats facing our environment is rising incomes in Africa, Asia, and Latin America. A generation ago these eople were happily frolicking in the rain forest, foraging for organic foods amid the wonders of nature. Now, corrupted by wealth, they are demanding environmentally hazardous consumer goods like cars and air conditioning and malaria medicine. You can do your part to stop this dangerous consumer trend by supporting environmentally aware leaders like Robert Mugabe and Fidel Castro to foster an economy of sustainable low-impact ecolabor camps.