Costco Next is the chain's best-kept secret that's free for members. I've already saved thousands of dollars using it.

• I love my Costco membership, especially because I get access to the Costco Next program.
• Costco Next offers members limited-time deals from name brands, like Viking and Travelpro.
• I saved thousands buying a shed through Costco Next, and I regularly see 40% discounts on products. 

I'm a huge Costco fan — the low-price staples, free samples, and the rotisserie chicken have kept me coming back.