BERNINA loves sewing spaces.
Wrap ribbon on round clothes pins, store in a candy jar.
Pencil boxes for sewing storage.
Pick up small, oblong plastic baskets which you can find at the Dollar Store for about $1 for 2 or 3. Organize your threads by color in these baskets, which by the way stack so you can save space as well. You could also pick up a larger plastic box or square basket and stack all of the smaller baskets inside to really get them organized.
Thread storage idea from 1893victorian farmhouse - vintage library card file
This was designed for holding small items like jewelry, but I think it would make a fantastic presser foot holder! They're even removable so they can be moved to your sewing machine.
Lots of extra lights in @eplevinski's sewing space.