My challenge is to eat out of what I have in the cupboards/fridge/freezer and only spend $100 for the whole month. Considering that we go through 4 gallons of milk a week and that's running $3/gallon, there's $48 gone right there! But I have an abundance of ExtraBucks at the moment, so I may be buying milk at CVS by the end of the month.
I think we will learn a thing or two about Emergency Preparedness through this exercise. I remember one ward I served in where the Bishop called a group of families one day and challenged them all to go the next 2 weeks without going to the store. They could help each other out with what they had on hand, but only within the group that wasn't shopping. He had a few of them speak in Sacrament Meeting after it was over. I thought that was a great way to teach about food storage!
I haven't done any crazy spending this month to prepare, but I have hit some good coupons pretty hard, so I know we at least have pasta and dishwasher detergent! Wish us luck!