I've shared about how to prepare for a nuclear event, and I think everyone who has a job needs to find at least $5 a pay period to use to buy preps. These preps could help you out of a financial bind - if your hours are cut, it's nice not to have to worry about buying as much food for a while. But that's the extent of their ability to help you. Everyone who has a job should also save at least $5 a pay period in some sort of savings account. If you loose your job, your preps will help keep you from starving, etc, but they will not pay your mortgage or rent, electricity, or water bills.
I have a CD that has the interest rolling back into it, and a savings account. I try to put $100 into my savings by my birthday each year. When my CD comes up for renewal, if I have more than $1000 in my savings, I take out the extra money and add it to my CD. My ultimate goal is to earn enough in interest that I can pay all of my bills and only work 1 or 2 days a week. This may not happen for another 20 years, but it is my goal.