My scraps get sorted into shoebox bins based on color. Anything smaller than a fat eighth makes it into the bin. I recently made Gypsy Wife entirely from scrap bins. It was fun to be able to say it was all scraps, but of course, just one quilt doesn't make much of a dent. I need to make a few more scrap quilts. The lid barely fits on the blue/aqua bin.
A few years ago, I cut 2 1/2 inch squares to make a "+" quilt, 5 inch square to make an "I Spy" quilt and another size for another quilt which I cannot recall. None of these ever became quilts. I've been swiping squares from the bins for other quilts... I just need to cut when I'm ready to make a quilt.