...don't piss your money away on an electric generator. When the poop hits the fan there won't be any fuel for it. Even if there is some stored in the ground at service stations, there won't be any electricity at these stations to pump it out of the ground. Another thing about them generator thingy's is that they make noise. That will tell your neighbors that you have something that they don't have and lots of them will think they need it worse than you do and they might kill ya to get it. Even the best neighbors can turn vicious if their kids are cold and hungry.
...don't plan on scavanging stuff at the store either. Everybody else thinks the same thing and everything, and I do mean every last thing will be gone. People will take everything the need and then everything they don't need because they might be able to trade it for something they do need.
...ya gotta put up some stuff ahead of time. I recommend a bunch of propane tanks and a decent grill. Ya can cook on it, boil water on it and it don't make any noise to attract two legged vultures. Potable water is another thing ya will be out of pretty soon.

Liberals are like a "Slinky". Totally useless, but somehow ya can't help but smile when you see one tumble down a flight of stairs!