I've visited Costco every week for 2 years. Here's what I've learned that's helped me save hundreds of dollars.

• I shop at Costco weekly for my family, which has given me a unique perspective on store operations.
• In my experience, the best days for new deals are Mondays, as sales typically end on Sundays.
• Some Costco stores have manager markdowns and the monthly emails have some amazing deals.

I'm an avid online shopper, but there is one store I love to visit often: Costco. For almost two years now, I've made weekly trips to the warehouse to shop for my family.