Try to stay relaxed. If you've done your homework it will be easy. Try to show how much you know about the marines. If and when you get asked questions about the RM's give all the information you know. Most of the interview will be on your easiest subject, You. :biggrin:
yep everything they have said above, and a few other pointers.
They like team skills experiance, so if you play football or any sports in a team that's always good.
It would be good if you could give an example of where you have taken a task and exeded or done very well, you know something that seemed hard but you completed it i.e. training and competing in a marathon, a project at school or work.
It would be also good to show that you are able to live away from home for long periods of time and you have coped fine.
I don'e think these points above are things you need but it will help you for sure. good luck budy.