Definitely have to be creative when the big sales come around. Often end up buying little things. I noticed that the 108" quilt backing isn't on sale - 2 yds will do a twin size quilt - at 50% off - that's $10 and no piecing.
I also use the coupons for things like the magnetic book marks, magnetic strip roll and crafty stuff for my preschool son and his cousins. That's how I keep construction paper in the house - Joann's coupons.