I use the ruler fold method. Take the fabric folded in half the way it comes off the bolt; fold in half lengthwise again. Now it's about 11" wide. Lay 6x12 ruler on one end and start rolling. When it's all rolled on the ruler, pull the ruler out. No cardboard or foamboard to take up valuable storage space.
I even stand my folded fabric on edge in dresser drawers. There is enough of it that it holds itself upright on edge and I can see every beautiful piece!