Plus, my credit card also gives me money back at Costco specifically. And if you use the right one, you might snag your fair share of cash back even if you don't pay extra for an Executive membership like I do. Click here for a list of the best credit cards for Costco shoppers.

Costco will have great Black Friday deals, so it's a perfect time to get a Gold Star membership at a low price.

The retailer's official holiday shopping event will run from Nov. 29 to Dec. 2. Here's what shoppers need to know for saving big now.