Costco memberships offer a world of value. Read on to make sure you're making the most of yours.
Retail bellwethers such as Lowe's (LOW), Costco (COST) and Walmart (WMT) possess a winning combination of established market positions, strong brand recognition and loyal customer bases.
Should you keep your more expensive Costco membership? Read on to see why it may be time to go back to a basic one.