10. Your time management was a joke
There is absolutely nothing worse than showing up late for anything; never mind an important job interview. Do you really even have to be told that? You may be running late through no fault of your own due to traffic or the weather. If this is the case, and you know you won’t make it on time, call the interviewer and try to reschedule. It will show professionalism and it will be appreciated and respected. If you just show up late, chances are pretty good that the only thing the interviewer will remember is that you were the candidate that showed up late. On the other side of the coin, don’t go showing up thirty minutes or more early. If you do get to the interview earlier than ten minutes or so, stay in your car and go over what you are going to say and review your notes.