Welcome, puny human, to the most epic survival guide the world has ever seen! You've managed to trigger the Doomsday Device, and now you're stuck in a world on the brink of destruction. Congrats!
Good luck with that. The skies are filled with flying shrapnel, the ground is shaking, and the air is toxic. Just find a nice, sturdy bunker or a hole in the ground. Preferably with a good Wi-Fi signal.
Don't be that guy who eats all the emergency rations. Don't be that guy who hoards the toilet paper. And for the love of all that's holy, don't be that guy who starts a conga line in the bunker. We're all gonna die, but let's try to keep some dignity, okay?
Hyperlinks: Step 2: Find a Safe Source of Water
Or, if you're feeling extra adventurous: Survival Tips from a Super Nerd