I received the automated email but accidentally deleted it. When I attempt to re-register it states something like "the email address has already been used" or that my registration is "pending" (or similar). What do I do now?

First, do not try to "re-register". That will only put you in a loop which could make you extremely frustrated.

Simply try to log in using the username and password that you created. You will then get a pop up notification to the affect of "your registration is not complete". At that point, the DAB site will send out another automated registration email. Once you get it, click on the link provided to complete the registration process.