I have a 45 mile journey home from work. Mix of suburbs and farmland and heath. Although I find it hard to create a scenario where I needed to walk the whole way home (and that was the right option) I do like the idea that I can if I need to.

I've found some of the ultralight backpacking sites a good resource for this - travel quick, not much kit, maybe one night holed up. Decent shoes and clothes, tarp, water bottle, map, some snacks and cash, plus my usual edc.