Internal Interview

As an employee, I have always gone into an interview as if I am the one interviewing them. When you have that kind of mindset, the confidence shows. Having interviewed a lot of people, for me, it's 1/2 about accomplishments, 1/2 about confidence. Get a good list of questions together to ask the employer. I am always impressed with people that have done their homework and ask relevant questions about the job and/or company. It means they take it seriously! These are the people that stand out for me.
Hope this helps!

IME, as an applicant and an interviewer, it's important to focus on communicating your accomplishments. Specific examples of things you have accomplished in past positions.
For example:
"When I worked at Joe's Box Company, I was able to reduce shipping costs by 27% by doing x, y, and z."

"When I worked at Wayne's Widgets, I reduced product waste by 12% by implementing a, and b."

Employers are more focused now on accomplishments and skill sets than on work history (think drab old-style job/date listing resumes) so be sure to highlight what you have DONE, what you can DO, and HOW you might fit with the new position due to experience and skill set.

Make sure you have a short description of yourself ready, that you can say in less than 5 minutes. Think of it this way: if the president of the company was in the elevator with you and he asked what do you do, you need to be able to concisely and with enthusiasm tell him your strengths, not your function.
No mumble-mumble "I am in marketing", but "I enjoy...."
Most of all, smile and enjoy, and make sure to ask questions. It is just as much a forum for you to make sure you would even WANT to work there, as it is for them to see if they want you.

I don't know if your job is in management or not. If it is, one thing you want to try to show them is your leadership ability.

A company can be heavy in management. Management tends to create layers of bureaucracy. What companies need are leaders. There is a difference.

Study up on that and use it in your interview.

Good luck!!
Dawn

M.:

Bring to the table what you have done for the company and what you will do.

In the position description - show them how you would approach the job and its responsibilities and be a success at it.

Bring your credentials to the table - show them what you have accomplished. Show them you are the person for the job.

YOU CAN DO IT!

I agree with everything below, but I would also add to that highlight the benefits of hiring someone from within (if you are interviewing against folks from outside) such as lower downtime to get up to speed on things, know the process for accounting, purchasing, approvals,e tc.
Good Luck!

Prepare a "portfolio" in addition to your resume. The portoflio should be a copy of the job description that was posted along with bullet points of specific examples of how you have accomplished each one of the job requirements. Bring the portfolio (word doc) with you to the interview and give it to the interviewer for their reference - they will be able to use it in comparing you with other candidtaes as well as be able to keep your interview fresh in their minds. It also shows that you have done your homework and really want the job. Good Luck!!!