I went to Target and got the shelving that you put together that is for closets. They have cubby units, shoe oranizer shelves and others that will all fit together. It worked out great for storage and you can add on as you need more.
My DH cut and painted some peg boards to use in different areas of the room. Its nice to have things where you can see it and find it and where you use it most.
Also:
cutting Table
Ironing Station
Tables for sewing machines
Design wall and desk for computer
book Shelves for books and Magazines
Enjoy your new sewing room!