I save as much as possible, making mini blocks for future projects,
and cutting scrap into 2" up to 6" squares, strips: 1 1/2" - 6", etc.
and store in containers. When wanting to sew, but not having a
special project in mind, will make simple 4 patch/9 patch/pinwheel blocks
and set aside. I try to keep stash more or less "organized" by color and
planned project.