Reading through this entire thread nodding and agreeing with most everyone buys
Some of the things we always buy at Costco are:
Car rental my second stop as soon after we book a vacation
Water that's the best $5 I spend all summer long!!!
Clorox Bleach those 3 bottles last forever
I went on Sensa because of Costco and its 50% cheaper than a vitamin store
POM juice if you go to a supermarket this is one of the most expensive juice ever but the size in Costco makes it worth the purchase and it's filled to the rim!
When we have parties I get the shrimp platters or the croissant sandwiches
Meatballs (either the chicken and apple or the meat ones) chicken, meats, seafood (especially the frozen lobster tails)
During the holidays wrapping paper, holiday cards, ribbon and if they have them Christmas lights and during the springtime weed and feed and roundup
Mr. Yoshidas sweet and sour sauce(we put this on everything and it comes out that much better).
The television, the computer, the camera the bluetooth headphones, memory sticks and my new favorite purchase the printer(it has air printing so we can print from our iPads and its an deluxe version that was cheaper in Costco than the basic version in
Best Buy).
Ink for the printers, all my office supplies, protein drinks, frozen pineapple chunks, friut bars, activia, grapefruit cups, paper products, vitamins, vegetables (frozen and fresh) Blu ray DVD (especially if I miss the first week sale - just got Willy Wonka on Blu ray for $10!!) toothbrushes(comes in handy with overnight guests) lots of toiletries, books -especially children's, video games, and consoles
Spa finder gift cards ($100 and you pay $80) movie tickets (we pick them up whenever we are there and save them for us or gifts) air mattress, car battery, air conditioners, batteries, flashlights, tires, I could go on and on!!!
3 things we get every trip to Costco:$5 rotisserie chicken $1.50 hot dog and drink (DH gets the turkey sandwich) and gas!!! That line may be as long as TSM but it's worth the wait!!