1) First begin by collecting receipts from your grocery purchases. Then figure out the average price per store for items you buy every week (after coupon if available). Example: I buy tortillas, oats, cheese, butter, olive oil, rice, tuna, etc.
2) Spread shopping over several shops to get the best price on your regular purchases. Example: I buy my oats and butter at Aldis but my meat from Publix. Go to Aldis one week, Sam's the next, etc.
3) Put aside a little money every week to build a stockpile. That way when you see a grocery cart in the back of the Kroger full of Parmesan in the green cans marked half off, you can buy 13 cans.
4) Buy a deep freeze, you need a place to store a lot of cans of Parmesan.
5) Talk to your elderly neighbors; they know where the best prices are. That’s how I found the day old bread store on Powers Ferry. I get 100 percent whole wheat bread for $1.25 a loaf and really awesome corn tortilla chips 2/$3 (14oz).