Mike Marchetti from baseimage and Kameleon007 from Getty Images Signature Do you have a specific age when you want to retire, like 60 or 70 or somewhere in between? If you are targeting a certain retirement age, you may be focused on the wrong thing -- at least if you listen to finance expert Dave Ramsey. Based on Ramsey's retirement advice, retirement isn't something that happens at a specific age. Instead, you can retire only when you have a big enough nest egg to support you. Your retirement readiness ...