How to get on Delta Upgrade List?

Booked your flight with Delta Airlines and are thinking of upgrading your flight to an upper cabin class, but you don't know how to get on the Delta Upgrade List or what modes are available to get on this list. To get on the upgrade list on Delta Airlines, one must be a member with medallion status, a credit card holder, or purchase an upgrade with miles or cash. For more details, contact the customer service of Delta Airlines or check out the blog at the mentioned link.