Furniture should have the flexibility and versatility of a good building toy. Stacking, combining, and re-configuring discreet elements to make storage for any space would save money and reduce waste. Instead of replacing the old furniture that doesn't fit in a new space, just take apart what you've got and re-assemble it in a configuration that works. With the multitude of rapid prototyping tools at our fingertips these days, we can produce dozens of copies of basic elements, then make highly specific specialized pieces for unique applications.
This quick-and-dirty laser cut modular storage system does just that. It's a 14 1/2" X 14 1/2" square box with one open side, allowing you to snugly fit a dairy crate in the box. There are also 4 evenly spaced holes on each face. The spacing of the holes allows you to stack and attach the blocks in a number of different configurations: side by side, vertically, horizontally, and stepped (like bricks).
Instructables' office is on the second floor of Pier 9 where there is limited space, even more limited storage, and exposed overhead steel trusses all over the place; so for the first use of this modular storage system, I made an attachment for an industrial truss trolley so we can move the storage around the office.
LOW-TECH OPTION: If you don't have access to anything like this, use the files I've provided as templates. Print out the pieces, spray-glue them to the plywood (use something like Super 45 since it will un-stick easily), and follow the lines with a jigsaw. If you're careful and take your time, you'll end up with the same result.