We use email in our media center for online ordering and for scheduling problems. Of course I use it to communicate to sales people as well as others in the office.
I have not done instant messaging. I watched my daughter do it when she was in college.
Nor have I done text messaging. It's one of those add on features on the cell phone that I don't have a good reason to pay for. So I'm not into all the shortcut words that are used!
Web conferencing I have done quite a bit of doing Minitex webinars as well as some online seminars from Adobe. This has been a great way to self inservice on my schedule.