Best Skills to Learn for Total Grid Failure?

[PrepperLinda65]

If the grid went down long-term, what do you think are the top three hands-on skills besides basic first aid everyone in the household should know? I’ve been brushing up on water purification, alternative cooking methods, and off-grid sanitation. Wondering if others focus more on

 

[MeadowWhisperer]

Fire-making without matches, proper food storage, and keeping seeds viable for planting would be high on my list. Has anyone tried long-term seed storage methods that actually worked?