16 shopping secrets that will save you time and money at Costco

Costco 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.