Pisa was just okay. Perhaps because it was dirty, overcrowded, and rather dodgy at night.
Take your pictures of The Duomo (the most awesome of the sights in Pisa, I think):
The Camposanto:
The Baptistry:
a supershot of the entire Campo dei Miracoli (including the Leaning Tower):
continue on to eat some tripe:
and high-tail it back to the rest of Tuscany.