My craft room is 10X12. The walk in closet is 4x4.
My shelves are full. My room is neat because I obsess... LOL. I have to clean up every night before I go to bed. I clean the floor every few days of threads and scraps too. When it's a mess... is when I scrap book. WOW... I'll take a pic of that some time. But, mostly, since I have storage I like, and the islands, it's pretty easy to keep up. Everything in it's place. Supplies, tools, books, fabric. I don't have a ton of fabric. And I sort and clean out a lot. It's a habit.