Did you know that you can add a + within your gmail address to automatically give yourself a new, unique email address that acts as an alias for your main address? Then, using Gmail’s filters, you can label/delete/forward those emails as needed. It’s a handy way to create a new unique email address on the fly without needing to go somewhere and actually create an account or explicitly setup an alias.
For example, the following email addresses will all go to email@example.com.
This works for gMail as well as Google Apps for Your Domain.
The main reason I bring it up is that it’s a handy way to create new Salesforce usernames without needing to take an extra step and setup a new email address for yourself. Also, it’s a handy way to keep your email organized because you can use Gmail’s Filters to do so.