To find affordable student accommodation in Boston, start by exploring university housing resources, which often list available dorms and off-campus options. Websites like Craigslist, Zillow, and Apartment Finder can provide listings tailored to your budget. Joining local student groups on social media or platforms like Facebook can help you connect with fellow students seeking roommates or subleases. Additionally, consider neighborhoods slightly outside the city center, such as Allston, Brighton, or Dorchester, for more affordable rental options. Lastly, be sure to set a budget and act quickly, as the rental market in Boston can be competitive.