If your work space is like mine there never seems to be enough room.
Threads and linen seem to take over-along with the dog fur, cat fur and other odds and ends that make life interesting.
To keep my threads handy I love to get the big loose leaf paper rings and put my threads on them either by color or by number. I do this with companies and colors I use frequently. I like to hang them on door knobs or on the back of ladder back chairs.
For those threads that I do not use as frequently or if the packaging does not allow them to be on ring binders-I get plastic storage carts that are clear and they have drawers. I put the threads in the larger drawers by company. If the thread line is too big to put them all in one drawer-I break them out into categories and put them in smaller drawer storage boxes.