First, renew Del Piero's contract for another 12 months, with the view of a coaching role. This is numero uno on the priorities list, in my opinion.
Wouldn't mind an attempt to get Balzaretti back to backup/challenge De Ceglie. It'll probably never happen, but I like him. I like Maggio also, but the guy can't finish, and he wouldn't ever get a game with Lichtsteiner and Cáceres in front of him.
IF there was a striker to be signed of the calibré of van Persie, and Vucinic really was to stay (God forbid) then it's possibly time to sell Matri. However I'm not sure he'll bring the sort of fee needed to tempt Juventus into selling.
The two I want to see out are Borriello (Utter, utter rubbish) and Vucinic (thanks for the odd goal, Mirko, but your inconsistency really irks me.) Neither are good enough for Juventus.