I ruler fold -- anything 2yds or less are folded selvage to selvage , then in half again and folded on either a 6" ruler or a 4" ruler. Larger pieces are folded selvage to selvage and then folded on a 6x24 ruler. I sort in a lot of ways: Fat quarters go in a CD tower from Ikea. Christmas, Laurel Burch, Fairy Frost and novelties are stored together. The rest is sorted by color, though I do group batiks together within color families. I have strips, squares and triangles in bins.