These days our homes are full of appliances such as mobile phone chargers that use energy all the time, even when they aren't in use. remember to turn off TVs, DVD players, computers, printers, modems, hi fis, games consoles, coffee makers, etc. when not in use. You can also turn off your microwave if you don't need the clock, and your electric toothbrush doesn't need to sit in its re-charger all the time.
You can buy standby reduction devices, or powerdowns, to make it easier to turn off every device attached to your computer or TV when not in use. It will automatically turn off all the associated devices when you turn off your TV or computer.