Ms. Koslyn's answer is absolutely correct. Mailing the work to yourself provides no benefit or protection. However, while you may hear that the work is protected without registration from the moment that it is created (which is true), that is a right without a remedy. You cannot sue for infringement without having the work registered, and you can lose all access to statutory damages. Therefore, you definitely want to pay the $35 and register the copyright. It is very straightforward, and...