Advertising Apartments or Rooms for Rent. Online or Offline

I have various websites I want to advertise. They all deal with either apartments or rooms to rent. I am open to advertising either online or offline. I have advertised on Craigslist in the past but am open to try more social networking sites like facebook, etc. If you have any kind of advertising background or have actually advertised successfully websites especially rental property please be free to bid. Also if you have advertised offline such as in newspapers I would like to hear from you. Interested in people who have had some experience. I advertise my websites to USA and Canadian markets only. Could be long term. Thanks,