Go to your main electrical panel, usually located in a garage or carport area on the opposite side of the wall from your electric meter. If you are in an apartment, the panel is usually in a closet or storage room. Open up the panel to reveal the various circuit breakers. The ‘tripped’ breaker will not be in either the on or off position, but in between. Sometimes a small red portion of the breaker will be exposed to show you the tripped breaker.
To reset it, just push the switch to the off position and then back to the on position. You should hear a snapping sound and feel some resistance. In the event that the circuit continues to trip, there may be an excessive load on the circuit. Correcting the overload should solve your problem. If that doesn’t work, contact Mister Sparky for an evaluation.