Retina Display MacBook Pro

Thanks Ray and all those who have helped my transition to Apple.

Mountain Lion Installed, Aperture installed, iPhoto updated as is iMovie, have just one question left and that is how and where do I load my Contacts for my email account?

I have opened and used my email but after exploring mail I can not see where I can import a list of those I have email addresses to.

Thanks again everyone I am going to give my MacBook Pro a rest for the rest of today before I burn myself out learning all I need to but I am really enjoying the experience and am attached to my Mac already. Pops