I'm only 24 but I've been in situations both as interviewer and interviewee. I'm sure more experienced people have more to offer.
Appearance and body language are crucial. People form opinions on someone within the first 15 seconds of meeting. Dress smartly - suit and tie, but nothing too flamboyant. Wait for them to offer you a seat when you enter the room. Be relaxed, but don't slouch. Lean forward slightly and maintain eye contact when they talk to you. A smile goes a long way, but don't try to be a stand-up comedian.
Essentially you want them to focus on you and your suitability. Don't wear loads of after-shave etc. That really pisses interviewers off and distracts them from the fact that you are great and the best man for the job.
Preparation, preparation, preparation. Know everything about the company - do plenty of research. Recent projects they've completed, who are their major competitors, what the situation in their market is.
Prepare good, solid answers to stock questions like:
1.) Describe a time where you have had to influence a group of people around to your way of thinking.
2.) Describe a time when you came across opposition to your opinion. What did you do to get your views heard?
3.) Describe a situation where a project has come across unforeseen obstacles. How did you overcome those obstacles?
4.) Describe a particularly successful/unsuccessful team. Why was it successful/unsuccessful? What did you learn.
They are some of the general ones I've been asked that I can remember.
Job specific ones I can't give you - I don't work in that sector.
Above all, don't get too nervous. They will make allowances to a certain extent - but if you are a nervous wreck, it doesn't look good. However, I've always found that a little nervous feeling helps concentration and performance - in exams and interviews.
Good luck mate - hope you get the job!
