Who isn't looking for ways to save money?
One of the ways that we celebrated the day was by opening the blinds on the windows to let the lovely sunlight in. We were able to keep the lights off for most of the day.
When we first moved into our house, I replaced most of the lightbulbs with CFLs. Yes, they are more expensive, but I've only had to replace one that broke in a freak accident in the last year.
The United States Department of Energy has lots of tools and tips for cutting your energy costs, too.