Buy a quality kill-o-watt - you will know for yourself (it's fun). My take-away after few weeks of measurments: - Mind your old devices! (My old Sony midi-hif

Buy a quality kill-o-watt - you will know for yourself (it's fun). My take-away after few weeks of measurments: - Mind your old devices! (My old Sony midi-hifi was running 20W on standby! Killed.) - Make a shortcut to switch off LCD monitors everytime you go AFK - energy consumption can drop 80W for two monitors (havn't checked LED monitors) - Don't obsess about chargers left in sockets (0.1W) - Modern big LCD TV is around 5W in standby; changing options of image (vivid vs. cinema vs. energy saver, etc.) while watching can make a difference of up to 50W.