The Garment District, Cambridge, New York Pizza on Tremont, South Street Diner (open 24 hours a day), Haymarket for fresh fruit and veggies on Friday and Saturday (very affordable), the North End, and Modern or Mike's Pastry for cannolis.
Quick Tips:
If you're a student in the city, get a Student Advantage card. There are discounts galore. Also, check with places you shop or eat to see if they give discounts to students with college IDs.Best Way To Get Around:
Take the T - definitely. Taxis are way overpriced. And there's walking of course.