Stay calm, think clearly, and remember that your mom always told you to have a plan.
Gather your emergency supplies: 5 gallons of water, 1 gallon of gasoline, and 1 year's worth of cat food.
Learn to identify edible plants, but only as a last resort.
Bury your valuables in the backyard, unless you're in the city, in which case just put them in a safe deposit box at the local bank.
Invest in a solar-powered ham radio and a good supply of ham radios.
Learn to cook with a fire pit, or better yet, a blowtorch.
Barricade your home with sandbags, or failing that, a lot of really thick books.
Diversify your assets: 1 Bitcoin, 1 ounce of gold, 1 case of canned beans, and 1 year's worth of dental floss.
Buy a water-powered generator, because that's still a thing.
Barracuda your way to a new job, or failing that, a really good nap.