Some advices
Don't miss the opportunity to discover and enchanted land!
I suggest a day trip to Pistoia (and Lucca)
A day trip to Colle di Buggiano, Massa e Cozzile (three small medieval villages)
Then you could consider a day trip to Florence, a day trip to Pisa and Livorno.
Or just an enchanting tour in the countryside (Chianti region, or Volterra, Montaione and surroundings).