3 day weekend + the devil

Change a light. Replacing a regular light bulb with a compact fluorescent one saves 150 pounds of carbon dioxide each year.*
Drive less. Walk, bike, carpool, take mass transit and/or trip chain. All of these things can help reduce gas consumption and one pound of carbon dioxide for each mile you do not drive.
Recycle more and buy recycled. Save up to 2,400 pounds of carbon dioxide each year just by recycling half of your household waste. By recycling and buying products with recycled content you also save energy, resources and landfill space!
Check your tires. Properly inflated tires mean good gas mileage. For each gallon of gas saved, 20 pounds of carbon dioxide are also not produced.
Use less hot water. It takes a lot of energy to heat water. Reducing the amount used means big savings in not only your energy bills, but also in carbon dioxide emissions. Using cold water for your wash saves 500 pounds of carbon dioxide a year, and using a low flow showerhead reduces 350 pounds of carbon dioxide. Make the most of your hot water by insulating your tank and keeping the temperature at or below 120 degrees.
Avoid products with a lot of packaging. Preventing waste from being created in the first place means that there is less energy wasted and fewer resources consumed. When you purchase products with the least amount of packaging, not only do you save money, but you also help the environment! Reducing your garbage by 10 percent reduces carbon dioxide emissions by 1,200 pounds.
Adjust your thermostat. Keeping your thermostat at 68 degrees in winter and 78 degrees in summer not only helps with your energy bills, but it can reduce carbon dioxide emissions as well. No matter where you set your dial, two degrees cooler in the winter or warmer in the summer can mean a reduction of 2,000 pounds of carbon dioxide a year.
Plant a tree. A single tree can absorb one ton of carbon dioxide over its lifetime.
Turn off electronic devices when not in use. Simply turning off your TV, VCR, computer and other electronic devices can save each household thousand of pounds of carbon dioxide each year.
*this is directly from Earth 911