Paul Sakuma/AP ImagesCostco is a goldmine for bargains.
But, the opportunity to save can be overwhelming, as you face seemingly endless free samples and bulk deals.
There are great bargains at Costco - even Morgan Stanley analysts say the retailer offers some of the best deals in the industry. However, to cash in on the deals, you need to know a few secrets.
Here's how to make shopping at Costco worth the price of membership.