1. You have eaten all the Gelato you possibly can.
2. You have said good bye to the major landmarks from a good picture taking vista. Plus you have taken enough pictures (approx. 601).
3. You have completed all the pages in your sketchbook.
Say good bye, stuff your suitcase as full as you can, be sure the gifts of wine are carefully sandwiched between the dirty clothes and your new scarves, then board the plane, and fly back home.