Craigslist

A web site called Craigslist (www.craigslist.org) is an online classifieds listing that includes posts for everything that newspaper classifieds used to contain and more. The site has listings in every state in the United State s, every province in Canada, a couple dozen international cities, and 50 or 60 countries
outside of North America.
Putting a listing to solicit participants in the ETC section of the Jobs part of the site for the target location can be extremely fruitful; for example, see http:/ sfbay.craigslist.org/etc. (Craigslist charges a small fee for job-
related postings in some cities.) Dana has received hundreds of email responses within hours of a posting going up on the site.
This has both great advantages and disadvantages. We recommend putting enough qualifying questions in the posting to prevent people who aren't qualified from responding, or so you can easily see who does and doesn't qualify as you make your first pass through the responses. After that, you must be ruthless in weeding people out. (For example, Dana has eliminated people from the pool if they don't answer all of the qualifying questions or if they give vague answers to questions about occupation such as "consultant"
or "engineer." She also eliminates people if their response was inaccurate or incorrect in referring to the activity for which they were signing up, such as calling a usability study a focus group.) The quickest way to start going through the responses is to set up filters in your email inbox to sort them for you automatically.