I like and support all of these ideas -- trying to go off grid, becoming more self-sufficient, reducing consumption -- but I will just add that few people/families historically have been entirely self-sufficient. It turns out that such a thing is a lot of work and really hard or impossible to maintain, depending on what your goals are. Even the Europeans that were settling in America in the 1700s were likely not self-sufficient -- there was plenty of gifting and trade throughout.

The key is your community. If shit really does hit the fan, I'd imagine that your chance of survival is much higher if you have a community around you where there is mutual support, rather than being entirely alone in a 200 acre woodlot.

(Not saying that your goal is to be 100% self-sufficient -- just pointing this out because I've idealized this before. It's an understandable reaction to the craziness of the modern world.)