-get your picture taken infront of Cheers
-north end: restaurante saraceno (higher quality italian for olive garden prices)
-fanuiel hall / quincy market: tons of touristy shops, but also lots of good restaurants and bars / nightlife
-if you like history, you should find a big list of stuff like the boston massacre site, the granary burial ground (sam adams, john hancock, paul revere are buried there), paul revere's house, boston tea party, the USS Constitution, old north church, bunker hill monument, etc etc etc
-you can see where all the boston crime movies were filmed
like the departed, boondock saints, the town, mystic river...