My sewing room is 8 x 8 and this is a rental house. I do have a good sized double closet and that is where all my fabric is stored. DH built a couple of shelves under the one that is on top of the hanging clothes rod. I have severely limited what I can actually have.
I use a kitchen rolling type cart for my cutting area. My sewing machine sits in a cabinet that belonged to my Mom. I have a set of storage drawers (plastic type) for scraps and supplies. Again limiting how much I save.
I hate clutter and like having things put away. It is imperative to keep a small place cleaned up or it just gets to be overwhelming.