I have this thing about only owning really light furniture that can be moved easily and/or easily dissembled, packed flat and then successfully re-assembled. If it stacks or folds even better.
Nomadic Furniture by James Hennessey and Victor Papanek was published in 1973. It's filled with handy, practical instructions and ideas on how to build or source and customize ready-made components for light weight furniture that is easily taken apart and moved. Of course, it's an interesting book to look at in the context of the current DIY movement, these two designers' place in design history and their influence on socially conscious design today.
A little history and some ideas on customizing your own "butterfly" chair.
There are some groovy ladies in the book showing you how it's done!
Some of my favorite pieces and things I would most like to make from the book are the stools/tables.