Last Updated: 10th Sep 2012
The trolley tour of Boston, offered as an optional, is the best way to see the entire city. Take it at your own pace, but I would suggest stopping off at the USS Constitution and Fenway.
MOMA is well worth a visit, and if you're short on cash, has free entry between 4pm-8pm on Friday nights. It does get very crowded though...
My advice would be to do as many excursions as you can. They are a great way to get to know your group, and they are always good fun.