I did not buy enough sale yardage when I did have the money. I mostly bought fat quarters when they were marked down. Now I have a good collection of fat quarters to make scrappy blocks but no yardage for backing, border, sashing or binding. Also I seem low in back ground fabric, the lighter tone on tone.
So if I could do it again I would buy 3-4 yard pieces for backs of laps and larger baby quilts and six yard pieces for twin quilts.
One yard pieces for borders, sashing and or binding.
As much of neutral back ground and basic tone on tone fabric I could get my hands on.