7 Interview Don'ts Check out the seven tips to find out what you should not be doing during and prior to your job interview.

1a. Show Up Late and/or Disheveled This is one of the most important parts of the interview process. Showing up late, smelling like smoke, chewing gum or having messy hair/clothes can all give impressions of being disorganized, untrustworthy, irresponsible and incompetent. Keep in mind that you're not the only person being interviewed, so little things like showing up on time might not have tremendous upside, but showing up late will make you stand out - in a bad way.

1b. Show Up Physically Unprepared Physically prepared means showing up with the correct physical objects; bring an extra copy of your CV and reference list; bring a pen and notebook to write down any pertinent information or phone numbers.  This also means physically preparing for the interview: shaving, making sure your hair is neat and your clothes are clean and wrinkle free.

2. Leave Your Cell Phone On How many times have you been somewhere - at the movies, in a class, at work - and all of a sudden you hear the latest Black Eyed Peas song blaring out of someone's purse. It'll be a small thing that says a lot: irresponsible, forgetful, unreliable. At worst it could show that you're not taking the interview seriously and are not interested in the job.

3. Show Up Mentally Unprepared Do your research on the company and position. The last thing you want is to ask basic questions about the organization and your role. You should also research interview questions. There are a number of sites that list common job interview questions. Imagine that you are the person doing the hiring and think of what questions you would ask someone. Practicing and thinking about these questions will make you calmer and more confident during the interview.

4. Be A Wallflower Be involved and engaged in the interview process, so don't be a passive participant. Speak clearly and with confidence, and if there is a time when you are asked questions, don't ever answer questions with "I don't know." This is especially important when you're asked about your salary expectations. When there is a chance for you to ask questions, don't stay silent; ask at least one question. It's best to come prepared with a question to ask - one that you think will not be answered during the interview process.

5. Get Too Personal It's best to focus on ways in which you can be professionally helpful to the company. So don't talk about your personal life unless you're specifically asked; focus on measurable and work-related experiences. This is not to say that you should be impersonal - you can be warm and professional without going into details about outstanding debt or personal problems with former coworkers and family. If you decide to talk about personal experiences, make sure they are work appropriate.

6. Do not go off topic Listen to the questions asked carefully and stay on-topic. Remember: the interviewer deliberately chose these questions and they are in charge! Repeating the question in different words shows that you understand what is being asked, and give you time to consider your answer.

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7. Oversell In an interview, it's not just "yes" and "no" answers. They can be open-ended and require anecdotes from past jobs, experiences that have prepared you for the prospective job and how your skills are applicable. It's important to answer the questions succinctly, and to then wait for the next question. If you can think of one strong example to back up a question, use just that one. Talking too much, and giving long and weaker answers are not going to help you - this is another advantage of preparing and practicing for the interview. Interviewers are doing a number of interviews, and will appreciate when an interviewee adequately answers the questions without taking all day.