[header] How to find a good roommate [title] Advertise online. [step] Websites like craigslist, padmapper, and roomie match can help you find the right roommate for you. Such sites allow you to build a profile or post an ad seeking out a roommate to meet your needs. 
[substeps] Craigslist is one of the biggest and most commonly used sites. As it's free, it's a great means to reach a wide audience.