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Many grocery chains now offer a loyalty card that lets shoppers —earnearningearnedearns points every time they make a purchase. Points are usually calculated based on the total amount spent before tax, and they can later be —redeemedredeemredeemingredeems for discounts or free items. Some stores also send members personalized coupons based on what they have —previouslypreviouspreviewingpreview bought in the past few months. Customers are reminded that points often expire after a certain period, so it is worth —checkingcheckcheckedchecks the balance before it resets at the start of a new year.