I ruler fold everything. For fabric greater than 1 yards I fold the fabric lengthwise twice -- selvage to selvage then fold to selvage, then I wrap the fabric around the 6x24 ruler. For 1 yard or less I do the same fold and wrap around a 3x18 or 4x18. For 3 yards or more I usually just fold selvage to selvage and wrap. I then stack the fabric flat on shelves.