$15 a week for groceries?

The title is a little misleading, as the author spent 15/week on groceries in 1990-I think that would translate to about 25/week now. A lot of it is common sense, but it's good to be reminded. It's always interesting to read the comments too as you can often find good tips there as well. Anyone have their own tips? The first one that comes to mind for me is to grow some of your own produce or herbs......not everyone can do that though.