The NYT has an article on a subject I’ve been forced to care about, since my office is now effectively more-or-less paperless (it is actually almost fileless, but for most purposes why have paper if you can’t keep it?): How to live without a printer.
The key recommendation in Getting By Without a Computer Printer is pretty obvious:
You can limit contact with your printer by becoming more familiar with PDFs
But the problem with .pdf’s is that I don’t know how to annotate them. I know how to take notes in the margin of a paper document. How do I replicate this virtually, easily, and visibly on a .pdf?