How to turn your electricity back on depends why it was turned off. It it was turned off at a breaker, go to the main electrical panel for your house. Lift the cover so you can see the circuit breakers. Push the breaker firmly to the off position and then back to the on position. There may also be a panel outside your home, where the main breaker for the entire house is located. You can repeat the steps for that breaker, as well, if the smaller circuit breakers don't restore electricity to a particular location or the power to your entire home is out. If this doesn't fix the problem, the power may not be coming into your breaker box. You would need to call the power company.