Item Driven Narrative
One of the things about post-apocalyptic stories is that you don't know what will be valuable, or what might drive the narrative. However, there are a few key things to consider when deciding what types of items might become more valuable. I've already mentioned the idea that useful items will probably play a significant role in the story, but quite often in post-apocalyptic stories the key items that have sentimental value. In Walkabout, one of the key ideas I had from the beginning was that trade only tends to occur on a local scale. Most settlements are generally self-sufficient, scavenging what they need from if they can't make it. However this limits available options. If a car needs tyres, and there's no more tyres of the right size, someone will need to modify the car to fit the tyres that are available. If someone wants a cup of coffee, and there's no more coffee around, there aren't many coffee plantations in Australia, and imports are no longer common....