DEBRA'S ANSWER:

The department of Energy Efficiency and Renewable Energy of the U.S. Department of Energy has an online Do-It-Yourself Home Energy Audit and a page on Professional Home Energy Audits. You can also find much more online simply by typing "home energy audit" into your favorite search engine.

Also contact your local energy provider. Mine actually sent me a survey themselves, asking me questions about my usage and when I replied they sent me a whole customized report on how I could reduce my energy use. Many providers have energy auditors who will come to your home to do the audit either for free or a small fee.

Debra :-)