Once you got the bug out vehicle or second hideaway residence covered, I would think (NBC) nuclear, biological and chemical protection. Do you have gas masks? I mean really good grade gas masks such as M40 or MCU2P with extra filters. Get the canteens you can drink out of with the mask. We are in a good location to procure high grade military gas masks as they show up in yard sales and thrift stores. Do not buy a M17! They are a last resort only! I also recommend a geiger detector. I bought the Gamma Scout model. I bought a broken one off of ebay and sent it in for repair calibration, cost me $260 total, runs constantly- battery lasts ten years. Sucks to eat food or drink contaminated from radioactive fallout. Or breathe it in. My father died from exposure to radioactive material weapons accident. Took 40 years then suddenly he had multiple myeloma.
Get all the vaccinations. When the SHTF the medical system will be overloaded. Do you have a recent tetanus shot?
Do you have a water distiller? Radionuclides will get through your water filter system. I don't even trust reverse osmosis. It would probably take filtering, reverse osmosis and distillation to get it really clean. I don't have a reverse osmosis system. Still lots of stuff to buy...

http://purewaterfreedom.com/filter-radiation

http://www.enlistment.us/field-manua...handbook.shtml


https://en.wikipedia.org/wiki/M17_gas_mask

https://en.wikipedia.org/wiki/M40_Field_Protective_Mask

http://www.gammascout.com/