If you want to spend money, build up a survival library, and learn everything you can about survival, and transfer that knowledge into your head.
If I may.... Transfer it to more than just our head. Transfer to disk and removable memory. Old Smart phones, tablets and laptops. The .PDF file format can take everything from scribbled notes to full blow books and combine it however someone wants as a near universally readable file format. The idea isn't to have gizmos with "signal", as signal is pointless after TSHTF. I learned a lot about how to keep those devices powered and operating for local look-up with almost nothing to work with during Occupy. Solar charging works for small devices and every vehicle is a mega-charging station, among other things.
Libraries worth of knowledge can fit on an 8 or 32 gig Micro-SD card. From making soap to making love or fixing predator problems to fixing vehicles. It's all out there for the taking and taken for granted. You're right OP. Knowledge will make all the difference.....but having that knowledge in a form that can be shared or even bartered ...may make it priceless in ways we cant really appreciate at the moment.