I have my stash of fabric organized by type of fabric...like flannels are all together, cottons are all together, knits together, some by brand, like Moda fabrics as different lines tend to match in color other lines, etc....and also by matching fabrics staying together. Maybe they are not all blue but they match with the green that has the blue in it, etc. Many times these were bought in bundles. Then the remaining fabrics are in categories like children's prints, horse print and matching fabrics, holiday fabrics, and then some of the rest by color. I do tend to forget exactly what I have so I go through my stash boxes (I use clear plastic file type boxes that stack) every so often. I think at this point that I have enough material to last me over 5 years of sewing at my current rate. I also am trying to use what I have already in my stash....but then I see something that I just have to make and so I am also buying new material regularly. So glad that I have my hobbies as I love to keep busy.
Lois