Are you using desktop power management tools, virtualization, or hosted software packages to reduce your energy use and go green(er)?
Did you decide to move your old-fashioned donor database off your organization's servers and onto Salesforce? Have you virtualized a server or even desktop machine so you can do more with fewer energy-sucking boxes in the room? Have you used a third-party power management program to help users put their computers to sleep when not in use?
Share your experiences with how you've lowered costs and your effect on the environment through using these or other methods here.