As I'm always cutting printer paper into scribble paper if it has one good side left. Can't see throwing it away. I keep all my cut paper in a plastic tote so when I run out of scribble paper I just go grab some from the tote under the cutting table. I print out my templates for quilting so there's always a lot of selvage leftover once I trim the template to size. When I'm taking down notes while online for quilt patterns or instructions while watching videos, I use these scratch papers to write on. I'm also constantly doodling numbers when setting up my quilting layouts as I need to remember the Y and X axis numbers.
Its great how us quilters can find uses for things designed for other purposes.