I too have decided that my stash is getting too big. I have mine organized by what I call my ugly fabric which is in the closet. My FQ are separated by color, although I paper piece a lot and none of them are still whole. Then my pretty fabric is stored under my cutting table. It is full. I am trying to use up my stash. I have been pretty good so far this year. The International Quilt show is here in April. That will probably be a problem. I have made several scrappy quilts lately out of my ugly fabric. I am donating them. They are nice looking quilts just not my style. My friend loves my ugly fabric and she just longarmed a quilt for me and refused to accept any money. I cut her 40 FQ of my ugly fabric. SHe is thrilled with it. She just started a quilt with it.
Good luck organizing it. Mine is somewhat orgainzed. Just start working thru it slowly.