I just returned from Italy. I had an inexpensive compass that was absolutely invaluable in Venice. I was able to navigate the winding passageways simply by following my compass. It was much easier than trying to follow a map.
Also, anyone going to Italy, should always have 1 euros in their pockets for the inevitable restroom break.
For anyone that enjoys touring palaces, the Pitti Palace in Florence is fabulous.
In Venice, meander the back streets and see a completely different Venice. The island of Murano is also a nice break from the maddening crowds.