In the user control panel, check the domain you want to push and then click on the "change account" button located near the top of the page.
You'll have fill out the contact information for the person who will be receiving the domain and then Godaddy will contact the recipient with instructions on how to complete the account change.
I don't believe Godaddy has a feature to instantly push like Enom does. If they do, someone speak up because it would be really useful.