If you're with Delta, this is an easy way to pick up 500 miles by signing up for email notices. You do have to stay on their email list until the mileage shows up, and do have to use a valid email address as confirmation is required.
You can use the same email address for more than one account.

Offer ends April 15, 2010.

Just go to www.delta.com/emails and it will redirect you to delta-emails.com to signup.

Hope this is not a repost, I did not find it searching all forums.
I apologize if this was supposed to be posted in the Delta forum, it wasn't clear to me which was the proper forum.

[ found at slickdeals.net ]