Some of the information in Thing Seven seems to me to be "common sense" or common knowledge. Example: The first video on What Not To Do With Spam E-mails. ("The system is already overloaded with spam, and we will not see the end in our lifetime.")
Of the five e-mail tips, I liked the one best that encouraged us to write less. We have so much e-mail to read at work and at home, that we are more likely to read brief messages than lengthy ones.
Our work e-mail recently changed so it was good to "start over" with no messages. This summer I attended a training session with helpful tips for using e-mail.
For awhile I had a hotmail account which is handy during travel. I have not used that for a few years, but access my regular e-mail accounts anywhere.
Instant Messaging
Webinars and Wikis
Webinars such as the ones MINITEX hosts are great for learning without traveling 160 miles to the Twin Cities. I have also taken some from GALE and other providers.
Wikis will probably see continued use by libraries. The MnPALS Office in Mankato has one now rather than so many mailing lists.