Saw a link to this on my favorite mom site. The article and photo are from the 1950s and show a year's worth of food for a family of four. The family spent about 25% of their income on food and the grocery list includes only corn flakes, margarine and shortening as "processed" foods.
Note the absence of soda, chips, frozen entrees, packaged crackers or cookies, or pre-made meal items. Note the enormous mound of produce.
Ah, the good old days. Not perfect, but a damn sight better than the average American diet in 2008.