There are several different ways to find the right room, like a room in a shared flat. Besides postings on the notice boards at THM and the listings available outside the Students Union office in Friedberg, you can also use the following links to find a room in a shared flat:
Students Union: Flat Listings, Available Flats
Ebay Classified Ads
Temporary Accommodations: For anyone coming from far away to look for a place to live in Giessen or Friedberg, temporary accommodations can be reserved for five euros per day. Around 100 temporary accommodations are available in rooms with several beds in the residence halls in Giessen. For each bed there is a cabinet with a lock that can be used as a wardrobe. Temporary accommodations can also be rented by simply paying a deposit at the Service Point in the cafeteria located in Otto-Behaghel-Straße.