I've cut my scraps and many fat quarters using Bonnie's system but do include 10" and 5" squares. I find they're more accessible to me this way rather than waiting until I decide to make a scrappy quilt. However, there are some fabrics I just can't bear to cut and those wait until I find the perfect pattern for them. These are usually fabrics from specific designers like Tula Pink since or Fig Tree since all of their fabric lines tend to play well together.