On no! 6hr power outage today. What to do?

I experience plenty of power outages and have never done anything to try and keep powerheads, heater or oxygenation going in my tanks.
It's not so bad since we were moved to a different power grid but we used to have at least 2-3 power outages a month and many have lasted longer than 12 hours
For what its worth - I have never lost anything in either of my tanks due to the outages.