I love pre-cuts & use a lot of them in my quilts. For me it depends on what pattern I am using as to how I decide the order of the colors. If they are really bright like a rainbow, I tend to keep them in the same order they were packaged.
It helps that I have a design wall, so I can arrange, or re-arrange them until I feel it looks right to me.
Just don't be afraid to choose one way or another & press on
