I save mine similar to Bonnie H. Just in sizes that I personally use. For instance, I'm making a lot of flying geese using my 5" charms with the method that makes 4 at a time. I need 2 3/4" squares for the small squares when making those, so I cut a bunch of scraps in colors I will need in that size. Anything longer than 8-10" gets left as a strip. I save strings that are at least 1" wide. Before I cut my scraps into useable sizes, they just sat and reproduced. Once I cut them all up, I was inspired to make something. My scrappy Granny Square quilt was my first result. To me they are more inspiring when already cut.