I'm putting the "After" picture first, for those who prefer to skip the backstory.
When I moved into my first apartment several years ago, I bought this entertainment center at Goodwill for six dollars:
It had a couple of shelves
and a big hole in the cardboard backing piece through which you could poke the back of your giant cathode ray tube TV.
This thing has been through two moves with me, but hasn't been used as an entertainment center for about four years - it just sits in the corner collecting dust and random items. I decided to turn it into a self-contained sewing station.
Inside the doors on either side of the shelves were these funky plastic slots for CDs (probably - that's the only thing I could find that would fit in them, anyway).
I pulled them out and put in shelves for my fabric stash. I glued on strips of cardboard for supports and made cardboard shelves that I then covered in black poster board to class them up a little.
The left side holds most of my fabric, wrapped around cardboard sheets to make it look pretty.
On the right side, I put little drawers (also made of cardboard covered with poster board) on the shelves and my larger fabric bits under the shelves.
The drawers hold thread and the bits of fabric that were too small to wrap around cardboard pieces but too big to throw away.
I wanted to turn one of the original shelves into a pull-out work surface, and this is how I accomplished that without any fancy hardware:
I moved four of the shelf pegs up to the highest slots so that one of the shelves can rest on them. The other shelf sits directly on top of it and slides out. Up in the corner you can see the staple I put in (there's one on the other side too) that serves the dual purpose of keeping the top shelf from sliding all the way back when it's pushed in (there needs to be some overhang in the front for you to grab), and keeping the bottom shelf from tilting down when the top shelf is pulled out. The piece of wood I nailed in on each side keeps the top shelf from tilting down.
I also hung some useful items on nails on the side. The blue thing is a ruler, and the brownish square is a magnet for collecting stray pins.
On the other side I installed a lamp I had lying around.
I fixed the back with a sheet of poster board. You can't see it very well, but the stool fits under the shelf.
This poor neglected piece of furniture should see a lot more use now.