Hiring the wrong people will cost you money and time. Your interview should be more than simply checking off a list of job requirements; you want to see the person behind the resume.
To get insight on personalities, have candidates sit near some of your employees before the interview and see how they interact with potential future coworkers. Ask questions that don’t directly relate to the job at hand – answers relating to fun activities or hobbies may tell you how creative or competitive they are and their participation in competitions or contests may tell you how they would manage successes and failures.
Hiring is a risky business and an interview is the opportunity to determine whether the candidate is a good fit for the job and the company. Look for someone who asks questions about you to find common interests or shared values, listens well and retains knowledge.