Yesterday, my co-worker Matt told me about some Gmail tricks I hadn’t heard of. Well, one is a trick, and one is just “nice to know”.
Gmail will ignore (some, all?) punctuation in email addresses. So email@example.com is the same as firstname.lastname@example.org. (That’s the nice to know part).
Furthermore, text after a plus sign is ingored. So, when you sign up for a new service, you can use a unique email address. You could sign up for amazon.com using bobsmith+amazon.com. All your mail will be routed to the same place, but you can block certain services and track who gives your email to spammers.