Google is finally letting you change the most important thing about your Gmail account. Here's how.

Here’s a little fact that will make you feel old: Gmail first launched all the way back on April 1, 2004.For the last 22 years, you have been stuck with the username you picked back at the start of the Iraq War during the Bush administration. For some, that means you were in grade school when you decided on the account name that would follow you for the rest of your life. Well, you don’t have to hold onto it any more, because Google will finally let you change your Gmail username to something mo...