What are the most common interview mistakes?

• Not preparing for the interview – including doing no research on the company and its services or products
• Wearing inappropriate clothes
• Talking too much
• Providing unnecessary details
• Inability to communicate effectively
• Bad behavior such as chewing or using slang and answering your phone (always switch your phone off) during an interview
• Blaming others for your mistakes
• Saying bad things about previous employers
• Not being able to provide examples
• Incompetence when tested
• Being late for the interview
• Asking the wrong questions
• Not following up after the interview
• Arguing with an interviewer