For many people, a computer is the central tool at work.

 Optimizing the energy settings for computers and other devices can be more than a modest energy saver. Set computers to energy-saving settings and make sure to shut them down when you leave for the day (“standby” settings will continue to draw power even when not in use).

 By plugging hardware into a power strip with an on/off switch (or a smart power strip), the whole desktop setup can be turned off at once (make sure to power down inkjet printers before killing the power—they need to seal their cartridges). Printers, scanners, and other peripherals that are only used......