My grandmother used to get Bay Day coupons in the mail and she would always try to get there before they expired in order to “save the 20%”. She would have saved more by not leaving the house but this is part of how I was raised.

Same with buying multiples of things like soup or spaghetti sauce or Kleenex because it is ON SALE. 40 yrs ago when a store had a sale there was a likelihood they would not have one for a while. Now with apps like FLIPP you can always find your favourite brands on sale somewhere and many of us are driving less than 15 min to find 4-6 grocery stores.
So, stop stocking up!!