Label each circuit or fuse in your home’s breaker box so anyone who opens the box knows which one powers which lights or appliances. If you don’t know which is which, ask an electrician to label the switches for you. Or you can get 2 people with cell phones talking to each other, 1 inside the home and the other at the service panel. As the person at the panel turns off breakers, 1 at a time, the person on the inside can identify the location that circuit serves. The panel then can be labeled appropriately to reflect the actual location of what each breaker controls.
That way, if you’re having a problem with electricity in a particular room or with one appliance, you can flip the switch that powers just that area–no guesswork. If you see the individual switch is “off,” you can solve the problem by flipping it back on.