The average home contains about 24 energy-sucking electronic devices, with TVs, desktop computers, cable boxes, and game consoles among the worst. Combined, they consumed about $20 billion worth of electricity in 2013, according to the Natural Resources Defense Council (NRDC), in New York.
It's easy to tweak a TV, so start there. Select "home" mode in the setup instead of "retail," which is meant for a bright in-store display. If there is an automatic brightness control, turn it on. "This feature measures the amount of light in a room and adjusts the screen. This can cut energy use by up to 50 percent," says Noah Horowitz, a senior scientist for the NRDC. On smart TVs, disable the quick-start function, which eats up extra power.