Ways to save money when computer is off from vampire power.

I just use a regular power strip and press the off button to turn off all my plugs on the power strip, so none of my electronics like chargers, USB hard drives, printer, scanners, etc are using any power when I'm not using them. If you do not need your computer, router, or cable modem to be on while you sleep, you can also plug them into a power strip and turn them off by plugging them onto a power strip and pressing the off button on the power strip.

If you are lazy, you might want to get a Smart Strip LCG3 Energy Saving Surge Protector with Autoswitching Technology, 10-Outlet which turns off all the other outlets when one of your electronics like your computer is turned off.
However, I just use a APC Essential SurgeArrest, 7 outlet power strip which is less costly. When I'm not using my computer, I turn off the power strip which turns off my monitor, speakers, USB drives and printer.

The good thing about using power strips or smart power strips are that you are also protecting your computer and sensitive electronics from surges, and spikes. Plus, by turning off your power strip and smart power strip, you will save some money on electricity and everything is off. Your AC adapters might also last longer since they are not ON all day.