Unplug what doesn't need to be draining power.

 The concept is phantom power consumers. When your charger is done charging your phone, it still eats the power it consumed when it was actively charging your phone. The "old stuff" that has nothing digitally displaying often has little phantom power consumed because it did nothing in standby. It's usage of power, though, was less efficient. Now the newest stuff is being designed to consume less while in standby because we've gotten smarter. The real issue is the in between devices that came after the old stuff but before the newer designs. These began implementing stand by options before we were fully aware of the cost those options would have.