Polonious says:

1. Arriving late.
2. Not preparing by viewing the company's website, understanding what the company does, or having questions ready to ask.
3. Leaving a mobile phone on, answering it when it rings, or worse, having a full conversation with the caller.
4. Dressing inappropriately.
5. Talking negatively about a current or previous employer.
6. Confusing or mistaking dates and details of previous employment and responsibilities.
7. Mistaking the boss for a secretary.
8. Not knowing the name of the person you are seeing.
9. Changing salary expectations.
10. Showing an inability to listen to questions asked or to respond with concise, relevant answers.