transfer from one computer to another.

I have a iMac i am selling. I have backed it up onto a backup drive with carbon copy cloner. I also have the timemachine back up.

I am buying a new imac. I might have sold my old one before the new one arrives. How can I add all my important files back. I do not want to clone the imac im selling.
Want to start fresh, but keep all my documents, itunes, contacts etc.

thx