Think of (only) 3 or 4 examples of experience and skills to discuss before you go. Don't rely on your brain to think of them during the interview.

To help you remember:

• Write detailed examples down on a piece of paper.
• Break it down into small things: what was involved, the problems that you solved, what you learnt from it, what went well.

  In the interview itself, give yourself time to structure your answer. Having concrete examples to hand should make this much easier, and avoid the ums and errs.