Electronic Energy Meters are inexpensive and easy to use. They plug right into a wall outlet, so you can then plug a lamp, TV, or fridge etc. into it. The LCD screen displays energy consumption. You can even input the price of electricity in $/kWh to calculate the cost of energy consumption.
Now youc an quickly measure the "phantom" power that electronics use when they're in standby mode, and ee how much it really cost hour after hour to run in "energy-saving mode". Check computers, printers, TVs and stereos.
Are you wondering, "is it time to replace old appliances?" Use the Meter to compare your current fridge with new Energy Star* rated models. And you can see what the table lamp in the hall, that burns all night, every night, really costs to keep on. Dollars you can measure. Habits you can change.