Let's be perfectly honest with ourselves. Over twenty years ago a man, a prophet, a technopath if you will had a dream of how humanity would end. What started with the automation of factories would continue until we had managed to foolishly make ourselves completely obsolete. Since that time there have been other prophets, other's who've seen glimpses of our futures and it's always bleak. Somehow we defy all logic and win but most of these are fairy tail victories that we shouldn't be counting on. We'll start with survival both things you should have set up in advance and things you should be considering for the future.
The advance planning for a Metalocalypse is the same as planning for any other disaster. Which means that if you don't have these things already you should be gathering them. Whether the disaster takes the form of a robot take over of the earth, alien invasion or something mundane like say an earthquake, hurricane or being snowed in it never hurts to have a few gallons of water at the house encase for whatever reason the pipes aren't delivering clean safe drinking water. The same goes for food. Every time you go shopping you should buy up just one of two cans of something that won't go bad and store in the back of a closet somewhere. I personally recommend doubling or tripling down as I have supplies in my house, office and car. I recommend emergency blankets and ponchos as well. You can't depend on the weather to hold and as bad as being shot by a robot would be it would be worse if the Resistance were killed by a cold snap. I'm not going to list everything just what I view to be the vitals.
2 Gallons of water.
3 days worth of food.
Flashlight with extra batteries (I recommend Mag Lights as they double as clubs, hammers and whatever other use you can find for a heavy metal pole)