Some people put all scraps in a bag and sew by pulling scraps out randomly. I sit down, empty my scraps and FQ and pull out the color groups or by theme like 1930 I want to use. So mine are controlled scrappies. Once I have a good amount of scrappies gathered I spread them out and squint to see if any pop in a bad way or if it looks like it will give the result I am looking for.