It CAN be tempting. But it's just like anything else where spending money is concerned. You just have to stay focused. Fortunately for me, Costco is in Nanaimo....and I avoid going to Nanaimo like the plague. So trips to Costco are a planned excursion which removes some of the impulse factor.
And not everything is cheaper there.....you have to know your prices. For example, our brand of coffee is more expensive there. Also, I have been on the prowl for some Shinto stools for a good price.....which Costco finally just got in....and THEY'RE almost twice the price as other places.
Right now, I'm waiting for these particular sheets they had last year, to come back. They are the ONLY sheets I will ever buy again. They have had them all year for purchase on-line....but they are twice the price as they were in the store.
If you have to, wear blinders.