Wars of the future will no longer be fought on the battlefield. Even nuclear missiles are becoming obsolete. The threat posed by cyberattacks is much greater, and their effects are even more widespread. Sophisticated hackers can not only steal cars, crash airplanes, and influence presidential elections, but they can also bring our financial system to its knees, paralyze an entire country's infrastructure (for example, through power outages), or cause immense suffering—similar to a nuclear first strike—by deliberately overheating a reactor. This small guide summarizes how ordinary citizens can prepare for crises and disasters with minimal time and cost, significantly improving their chances of survival compared to unprepared individuals.