Nojo Design on Instructables website shares a great way to create storage that can fit under a staircase or upon an unused wall.
The step by step picture tutorial is a medium to advanced level project for the homesteader seeking to maximize their storage opportunities.

Click here to read how you can create this project for yourself:
http://www.instructables.com/id/Nojo-Design-Large-Step-Cabinet-February-2012/
.
.