Find out how many are on the panel and make X amount of photocopies so each can see your portfolio at the same time. Even though they might have a copy of these already with your application if they don't it's bad having to wait for someone to finish reading something and means one person will always be reading and not paying attention.
You didn't mention what type of job you were going for, a higher level job usually has harder questions than an entry level one. Some even have exams.
Some usual questions i've had:
Why do you want to work for us?
What do you think your strengths are?
What do you think your weaknesses are?
What do you know about our company?
What do you know about the position?
What kind of salary would you be looking for?
Why did you leave your last place of employment?
What makes you think you would fit in with our company culture?
Have you ever worked for someone you disagreed with? How did you handle that?
If you found an employee stealing what would you do?
If you were asked to act in an unethical or illegal manner by your supervisor what would you do?
Describe your ideal job.
Do you have any questions you would like to ask us?
They usually ask open ended questions and you have to sell yourself the best way you know how by answering. Make sure you stay positive, if you think you have a weakness show how it can also be a strength and how you are working to fix it and so on. For example if your weakness is you like to take your time making decisions then say this shows you are thorough and like to avoid mistakes the first time around instead of having to fix things later. Then go on about you are adaptive enough to handle mistakes which is a strength but if given the choice you'd like to avoid them. Say that with a slight smile, most times the interviewers will nod in agreement or even give a chuckle because everyone has been at the hands of someone incompetent who rushes in.
Use humour and tone to keep it light hearted but don't treat it like a stand up comedy act.
Think about what the interviewers are looking for, if they can identify with you it is harder for them to say they have a bad vibe. Read the job description so you know what is expected, also do a little research on the company. People hate it when you apply for a job and have no idea what it's about or who the employer is because it makes it look like you just sent your resume to everyone and didn't really care enoguh to do research. Make sure to think of answers to the other questions above. Think up justifications for each answer as well, a yes/no or one word reply doesn't cut it for most jobs, they need to know you can think on your feet and talk if needed.
The more interviews you do the easier it gets
