Attend a few open houses in your area to meet agents first hand and watch them work in the field. Its a great way to see how they represent their sellers in the public venue. Are they friendly, engaging,informative and interested in the house their representing, if not, move on... Internet sites are also a great way to compile a list of agents to interview, I'd try to narrow down possible listing agents to 3/4 to interview. Before choosing my 3/4, I'd thoroughly review websites for local realtors and be particularly looking at each realtors experience, dedication and most importantly their internet presence. Are their listings on realtor.com, homes.com, zillow, trulia, and other important sites? What about their photos, are they representing the seller in the best possible light? Notice things like: are the shades up and curtains open, are the rooms staged or cluttered, is the kitchen clean and free of distracting items are there animals, humans in the photos. The photos should be professional and show the property & amenities, NOT an unmade bed, a toilet, or a closed curtain. Now your probably getting ready to narrow it down to a couple of qualified, professional realtors. Last test for sense of urgency in your listing agent is to throw an email out to each and see how quickly they respond to your email. Those items should help you determine somesones style of marketing, work mode and their sense of urgency . Good luck!