Updated Wednesday 1/8/14: So, earlier this week, I told you about a little game I play with my husband every January. It involves our grocery money.
We give ourselves a budget, and tell ourselves that, no matter what, we will not go over that amount of money for groceries.
On Sunday (our shopping day) gave ourselves $150 that should last all week for our 3-person family. (Usually we just "try our best" with our shopping, but don't give ourselves a monetary limit.) We spent $60 for our first shop and had $90 left for the rest of the week.