How to Transfer Purchases in iTunes

Ever need to transfer your purchases from your iPad or iPhone from one computer to another? After getting the alert multiple times I figured it was time to learn. To transfer your purchases – you need to control click on your device (after connecting it to the computer you want to transfer the items to) in the iTunes “Device” list and then select “Transfer Purchases…”

More information: http://support.apple.com/kb/ht1848