"Can you teach me how to send email again?"
"The internet crashed!"
Yes, you parents and classmates occationally say such silly things. But more often than not I can't help them over the phone because I can't see what they're doing. Here's a free remote access program that should solve that problem, called Logmein.
Also works for accessing your own home computer from work or the other way around. Great if you've got broadband connections on either end. I'll try with someone who has a dial-up connection and let you know what happens.