Manage your monitors
Another IT myth is that screen savers save energy. Not true! Generally speaking, screen savers do not save energy and might prevent your computer from entering sleep mode. To save money, you should disable all the screen savers on your computers.
In the power settings, many computers now have the option to turn the display off automatically after a nominated period. Save money by setting your display to sleep mode after five minutes of inactivity.
You should also fully turn off your monitor when you go to lunch or leave work.
By lowering the brightness on a monitor, you can also reduce the amount of energy it uses. Reducing the brightness of LCD monitors can reduce the energy usage from 34W to 20W.
Over the course of a year, this saving will add up, regardless of what type of monitor you use.