Step 1: Gather materials. This will be the most important part of your bunker's aesthetic.
Concrete blocks, steel beams, and a hint of postmodernism.
Step 2: Build the foundation. This will be where your bunker will sit, nestled comfortably in the earth.
Make sure it's deep enough to fit all your favorite snacks and a few essentials, like a toilet.
A hydroponic garden for the ultimate self-sustaining experience.
Or, if you're feeling extra paranoid, add a hidden compartment for your most valuable possessions.
Or, if you're just feeling fancy, add a mini-fridge for those late-night Netflix binges.
For more information on advanced features, check out Subpage 201: The Bunker's Finer Points or Subpage 202: The Art of Bunker Security.