Develop night vision and the ability to remote access cyberspace using your higher-operating brain functions - circumvents blackouts of any kind.
Back on topic, I've never been in a blackout that lasted more than a few hours, but I have seen a portion of town go out for power for a full night. Then again, I also have surge protectors and backup generators just to be safe. I've got two of these units because my father is paranoid:
And they're pretty fucking handy as I've noticed incidences of power surges followed by a clicking noise from my Tripp-lite unit - and of course everything else is hanky panky, business as usual.