One of the basic scenarios I think worth planning for is a nuclear strike that requires you to remain indoors for a couple of weeks while the fallout decays away. I have enough food and water stockpiled for that, and there's plenty of bedding to conserve warmth.

For economic problems, I have made a point of keeping my gas and electric suppliers different in the hope they won't both fail at once. I also have an open coal fireplace and I keep a reserve of coal, albeit not in the main house. I live on the edge of a village, so there is potential to forage for wood outside.

In the longer term, I have dependencies on civilisation I find hard to break. I'd need to learn a new trade, for example.