I've been writing about frugal living on the internet for around 20 years, and since the cost of food is one of the few expenses that are under our control, I have written about that often.
Some of those articles are still floating around the internet, so I'd like to share some of them with you:
Tomatoes: Keeping Beyond Canning
Self Sufficient, Food Wise
Brand Name Mania
Dehydrating Food (Extremely Frugal)
Stock Up On Free Food
Save on Groceries by Using Less Meat