Most of my fabrics are ruler quilted (or guesstimated) and sorted by color, then put on shelves. Those that are multicolored are on a different shelf. Large pieces are in their own stack. Big plastic boxes (about 7" deep) on another shelf are used for specialty fabrics like taffeta and satin, and odd/unique fabrics with sequins, etc.
I used to go to swap meets where vendors bought leftovers from manufacturers and sold them for $2/yard. Sometimes much less if you didn't mind going through piles of fabrics and trims on the floor. It was great fun and now I am grateful that I have a stash because I've been able to make art quilts that needed to get out of my mind and on to fabric.
As an aside, some of those fabrics from the floor became award winning wearable art, photographed and written about in sewing magazines. I've had judges and teachers who would buy only cotton, but I'm not a fabric snob and, sometimes with interfacing, could make "junk fabrics" work.
I also use plastic shoe boxes or sweater boxes to store supplies & info from classes I've taken, and sometimes I label them. I don't always use labels because not knowing what's exactly in a box forces me to look through them and I always enjoy that.
It took a long time to get everything sorted, but when I go into my studio now, it gives me feelings of peace and excitement at the same time. There's wonder there, too, because when I started to sew, not even into my teens, the only fabric I had was what I could buy with money I earned from babysitting.
I feel so lucky, even more so in times of Covid, to be able to escape real life when I go into my sewing room.