SHELVES!! What I have found to work best for me, is wire shelving that is no deeper than 12" deep for the fabric. I also want to find some baskets the same depth, as my stacks of fabric can get wonky after pulling them out and putting back. I keep all of my packaged patterns in a cheap little file cabinet, which can double as a small pressing area (Walmart). I found a large kitchen island with casters and tons of storage for $30 (Craigslist or yard sale)..I use it for another cutting area/ multi-purpose surface/ storage, plus I can move it closer for extra quilt stability. I would also buy shelving for your closet...perhaps one of those closet organizers from Lowes/ Walmart, or the wire shelving that you can design/ install yourself.
Hope this helps you get started. Have fun! You will no doubt change it a few times, as you will learn what/ where you need things as time goes by. I can't get mine perfectly efficient and it's been nearly 2 years! lol