The grocery store is a double-edged sword. It's a place you can't avoid, but it can also cause an undue amount of stress on your wallet each week. How do you buy quality food and other necessities without breaking the bank? Coupon expert Joanie Demer shares her best tips for shopping wisely and frugally — so you get everything you need each week and keep a little (actually a lot) of extra money in your pocket! 1.