I'll let you in on a little secret. You know those little dots in your Gmail address--like the one in 'firstname.lastname@example.org'? Gmail doesn't recognize them as part of your email address. That's right, email@example.com will receive all mail that's sent to firstname.lastname@example.org, email@example.com, and even john...........firstname.lastname@example.org or email@example.com. It's an interesting quirk of Gmail, and one that you can use to your advantage.
Suppose that you want an easy way to separate business e-mail from personal e-mail, without having to individually label each message. Simply give your business clients the e-mail address "firstname.lastname@example.org," and give friends and family "email@example.com." Messages sent to eitheraddress will come to your inbox, and you can set up a filter that automatically labels messages sent to "firstname.lastname@example.org" as "business."