I hope these qualify:
I use a receipe card box for all of my quilting books. I write the title, author and then file them. I can keep better track of them, especially if I loan one out.
I have a supply of lint rollers for rag quilts. They pick up all the loose threads faster than I can.
I also have a mid-size mirror that I hang by my quilting frame. When I want to check the stitches on the back, I slide it under the quilt and can see how they look.