There are lots of great things to do depending on the time of year your journey falls on: if you go during the winter then bring lots of warm clothes because Boston is best seen by foot. No matter when you go I would start out with the freedom trail, it's a great way to begin to see the city and you can't get lost when following a red line!!
Quick Tips:
My suggestion would be to enjoy the different places Boston has to offer, such as Fanueil Hall, Newbury Street, the Boston Commons, Haymarket, Downtown Crossing, China Town, and nest of all the North End.Best Way To Get Around:
Definitely a walking city!! However, the Duck tours from the Prudential are fun too.