|This is not sale fabric!|
When I get home, before I forget, I always mark the defect on the fabric. Whether it's a piece of masking tape or a garage-sale dot, I cover the blemish. That way, when I go to cut it that night, next week, next year, I don't forget about it.
Hard lesson learned? You betcha! Once upon a time, in my early quilting days, I cut up an entire cut of fabric only to find I was one block short because... I had forgotten about that hole. Fabric is too expensive to take chances.