The American Council for an Energy Efficient Economy (www.aceee.org) offers energy-saving tips and links to websites about energy efficiency.

The U.S. Department of Energy's site (www.energy.gov) has efficiency tips and information about global warming and alternative fuels. You can even ask an expert questions on energy efficiency via e-mail.

The U.S. Department of Energy's Energy Efficiency and Renewable Energy Clearinghouse (www.eere.energy.gov; or call 800-363-3732) has information on everything from solar heating to home insulation.

Do an on-line energy audit of your home at www.energyguide.com. Click on "More Ways to Save" and enter your ZIP code to learn about rebates and product offers in your area.

The Lawrence Berkeley National Laboratory's site (www.lbl.gov) has a home-energy audit.