I email myself all the time. Either to make sure a note is somewhere I can get it or to verify the email service is up. This week I was dealing with verification with "forgot your password" that had to be acknowledged within 30 minutes, but the email took 2 hours to arrive. But sending it to my self was instantionous, so it was something on the verification's site.
Japanese telephones work pretty much like ours, except the person on the other end can't understand you.
E-mails sent to yourself are also a good way to back-up important files. I periodically e-mail copies of the book I'm working on. I back up the fiels elsewhere, too, but an e-mail is a good last resort.