http://www.daveramsey.com/ Is a good resource for managing your money which is also a part of preparedness.
I find shopping at the discount clubs not only saves me money but also allows me to have substantially more than 72 hours worth of supplies on hand. My full size chest freezer allows me to take advantage of good process of good prices when I can find them and I try to buy a little extra each month to get and stay ahead of the curve.