I see a theme on this thread! Like others, we buy:
bottled water
K-cups (best price I've ever found)
Kirkland laundry detergent
rotisserie chicken
organic chicken and ground beef
pork chops (aren't soaking in salt water injection, so they can take a marinade/brine)
Kirkland frozen shrimp (also not crazy saturated with salt preservative, making them taste much fresher)
Chicken Chipotle Flautas
Hebrew National Hot Dogs
Pineapples
organic canned tomatoes
vinegar
nuts (mixed, almond)
Charmin
wine
printer ink refills at the photo department
generic Omeprazole
tires
wrapping paper/tissue paper
Also, I don't know if this is local/regional thing, but they have these two packaged curries, Butter Chicken and Sukhi's Chicken Tikka Masala in their refrigerated section (i.e. the area where the nice cheeses are, fresh pasta, party type foods, etc). I really REALLY don't do most prepackaged family meals due to a) fake flavor and b) preservatives and additives. But these are AMAZING. The chicken in it is even good quality, and the ingredients aren't a bunch of chemical names. I do add some more veggies, like cauliflower and peas, and cut the chicken smaller, but it's amazing as is over rice. My mom spent a few months in India for business, and has missed the amazing curries. When she visited us, we had some of this on a night in, and she said she hadn't tasted curry that good since her trip.