Save energy to save money.
Set your thermostat a few degrees lower in the winter and a few degrees higher in the summer to save on heating and cooling costs.

 
Save water to save money.
Take shorter showers to reduce water use. This will lower your water and heating bills too.
Install a low-flow showerhead. They don't cost much, and the water and energy savings can quickly pay back your investment.

 
Less gas = more money (and better health!).
Walk or bike to work. This saves on gas and parking costs while improving your cardiovascular health and reducing your risk of obesity.
Consider telecommuting if you live far from your work. Or move closer. Even if this means paying more rent, it could save you money in the long term.

 
Eat smart.
If you eat meat, add one meatless meal a week. Meat costs a lot at the store-and it's even more expensive when you consider the related environmental and health costs.
Buy locally raised, humane, and organic meat, eggs, and dairy whenever you can. Purchasing from local farmers keeps money in the local economy.

 
Skip the bottled water.
Use a water filter to purify tap water instead of buying bottled water. Not only is bottled water expensive, but it generates large amounts of container waste.

 
Think before you buy.
Go online to find new or gently used secondhand products. Whether you've just moved or are looking to redecorate, consider a service like craigslist or FreeSharing to track down furniture, appliances, and other items cheaply or for free.

 
Borrow instead of buying.
Borrow from libraries instead of buying personal books and movies. This saves money, not to mention the ink and paper that goes into printing new books.
Share power tools and other appliances. Get to know your neighbors while cutting down on the number of things cluttering your closet or garage.

 
Buy smart.
Buy in bulk. Purchasing food from bulk bins can save money and packaging.
Wear clothes that don't need to be dry-cleaned. This saves money and cuts down on toxic chemical use.

 
Keep electronics out of the trash.
Keep your cell phones, computers, and other electronics as long as possible.
Donate or recycle them responsibly when the time comes. E-waste contains mercury and other toxics and is a growing environmental problem.