A Panacea Of Preparedness

I keep hearing about how this is "the big one" and how we should all be "stockpiling," but it may not be so simple. How will we even know what we will need? There are so many different options. Should we focus on tech, self defense, food, sanitation, chemical? These are such vast aspects that one can hardly secure them all. What I would say is that humans will survive this. We survived everything else.