You can search for agents in your zip code on Zillow. Read existing reviews. Ask if your agent is a Realtor (member of the national realtor association). Realtors invest more in their continuing education and are held to higher standards in the industry. Make sure your agent has worked with buyers before you and they shared positive reviews. Meet with two or three agents and see who seems to have the best grasp of your needs. Ask what their expectations are of you.