In order to save money on last minute trips to the grocery store, we started planning our meals two weeks in advance.
I do one big shopping trip once every two weeks and in between I go once for more milk and some carrots. NOTHING MORE.
We have saved so much money and I finally get to try out all those recipes I've been wanting to try, since I plan ahead and actually have the ingredients on hand instead of doing a spur the moment kind of thing, where I have to wing it.
This summer we are also being a part of an an agricultural share.
http://en.wikipedia.org/wiki/Community-supported_agriculture
Here is more about it.
We went in with some other families and for $3.50 a week we get veggies from a local farmer.