Entertainment devices use electricity even when in standby mode. Where possible, turn off at the power point when not in use. Or plug your devices into a standby power control board, which will automatically switch them off for you.
Games consoles can cost around $450/year just on standby,
TVs are now the fourth largest energy user in our homes. The cheapest and biggest TVs aren’t necessarily the best – they will cost you more over the life of the TV, and may not produce the best quality picture.