Hi, i have 7 days to travel around florence in Easter. Besides Pisa, what other places are recommended to visit. thanks.

Lucca, Siena, San Gimignano, Volterra, Montepulciano, Montalcino, Barga ....
You need to read a guide book to decide which of the many places would be interesting to you.
Train Florence to Pisa and Lucca www.trenitalia.it/homepage_en.html
Bus Florence to Siena or San Gimignano www.busfox.com.timetable
Buses from Siena www.trainspa.it/train04/extraurbano.pdf
Edited: 3:07 am, January 23, 2013Don't forget the small hilltop town of Fiesole, just a twenty minute bus ride from Florence, You take the No. 7 bus from Piazza San Marco.
…intoscana.it/intoscana2/export/TurismoRTen/
check the official website
Deidre...get a good guide book and spend a couple of quiet hours doing some reading....
I would say that the suggestions of sydneynick above would fill your seven days in/about Tuscany. Lucca is a charmer!
Michelin Green Guide and/or Cadogan Guide Tuscany would be good ones to consult.