I imagine that you’ve thought about trying to reduce the amount of paper you handle.
A good place to start is reducing the amount of paper you generate.
A GREAT place to start that is to quit printing documents for reference, just keep them on your computer.
Saving output to PDF is a great place to start, and you can do it for free. PDF isn’t perfect, but it’s good enough for capturing page images, so it’s a great substitute for paper.
On the Mac (OS X only): print your document, and use the PDF link to save a copy.
(Yes, “It just works.”)
On Windows, install CutePDF and use the virtual printer that it creates to save your output to PDF.
In both cases, be sure to check that the information you wanted is in the printout!
If you want to REDUCE the paper you print, but need a few reference pages:
On Mac (OS X): print your document, and use the Preview link to send the PDF to the Preview application. Print the just the pages you need.
On Windows: use the page preview menu item (if supported in the application), and print just the pages you need. If page preview is NOT supported, create a PDF (see above) and print just the pages you need.
Unfortunately, PDF isn’t the greatest format for archiving, but it’s a good step in the right direction.