Question: Changing apple ID
I set up my husbands computer with my apple ID. Now that he is (finally) getting an iphone, I need us to have different IDs. Since he used my ID to buy a bunch of music from itunes, I figure it's best to let him keep it and get a new one for me. But I don't want to lose all my data - contacts, photos, calendars, kindle downloads, and especially keychains. I have that ID on my mac, my phone and my ipad.
What do I have to do to protect/keep everything?