I went to Boston and back in under 24 hours and packed in Dane Cook’s Vicious Circle taping at Boston Garden, a museum, four restaurants and pretty much all of Harvard square. Your ass will be kicked by the end of it but it’s good stuff. Go look at the big dig, grab some food at Fire & Ice an interesting bar & grill in Harvard Sq, wander the shops, see the aquarium, check out the duck boats or ride one, the big dig which looks like the biggest mess of all time and from what I understand kind of is, wander around on the T and you’ll have plenty of fun. And best of all, you’ll only need to spend maybe $40 if you feel like picking up some stuff.