Outlets are not working:
Rule out equipment failure by trying to power the equipment from another outlet. If you suspect that the outlet is the problem, reset the breaker to see if this resolves the issue. You may need to reset the GFCI.
The whole property is without power:
If your property is the only one without power, it is likely caused by a breaker that has been tripped. Locate the breaker box and reset the breaker to see if the power is restored. Call your electric company if you continue to experience issues, to see if there is an outage in your area.