Making e-mail into a source of information.
As much as I try to convince people to go beyond them, most (if not all)
of the people whom I've encountered through the various courses I've taught
see a web page as the ending point in their search for information. I frequently
stress that if you find a page that contains interesting information that
suggests that whoever wrote it might have more along the lines you're interested
in finding, e-mailing that person is a legitimate, and actually quite frequently
worthwhile, means of getting more.
Still, I seem to have convinced close to nobody that this is a valid
approach. Perhaps my correspondence about the Emma Lazarus poem can be
a convincing example.