Most of the printing of our group (~30 people) is done on just one laser printer. I often find myself walking from the lab to the group library, where the printer is located, and back because of paper jams or printing orders that have misteriously vanished into the digital nirvana. This is making me crazy! Somehow I am unable to proofread a manuscript on my computer screen, so I always need a printout. Maybe I should try and get my own printer.
This leads me to my question: Do you often print papers for reading, or do you always read the PDFs directly? I try to read most things directly, but the papers I cite the most, I also keep in printed form.