Remember the paperless office? By now we were supposed to be handling all of our documents digitally, and saving trees by using computers to handle everything electronically. If you’d like to make backup copies of ephemeral content without printing it out, turn your Linux box into a PDF generation device for your entire network.
What sort of things might you want to save as PDFs? When you buy stuff online, virtually every site provides a receipt, which you may want later if the order email is lost or if you need to send in a receipt for expense reports. However, you may not want to print all of them out just to keep them around, and Firefox only supports writing to PostScript, rather than PDF.
What you’ll need is a Linux box with the Common UNIX Printing System (CUPS) and the CUPS-PDF driver. I set this up on Ubuntu Feisty, but it should work on any Linux distro with CUPS and the CUPS-PDF driver.