Tuscany in 4 days

A 4 day tour through Tuscany.

If you need to do it in 3 days:
1) skip south Tuscany (day 3). Go from Siena to Pisa. Skip San Gimignano on day 2 and do it after Siena on day 3.
or
2) skip Cinque Terre. After Pisa/Lucca drive back to Bologna.