Well firstly - good luck!
Secondly,
Run through the 'scary' scenarios and how they can be resolved
At the interview, if your mind goes blank - to buy yourself time, take a deep breath, repeat the question back, pause, and then begin to respond.
Remember if there's more than one person interviewing, make brief eye contact with all of them when responding to a question, irrespective of who asked.
Draw up a list of concrete examples of your strengths (and a couple of weaknesses) based on your previous working experiences
Use strong, positive, action words and phrases ('will/won't' rather than 'can/can't', 'I successfully did...' etc) from now, not just in the interview. The brain acts on an 'action' words rather than any 'noise' surrounding the action word so, if you use positive actions words when talking about you and your experience that is what the interviewers will remember.
The reason so many people trip up after being told 'don't fall' / 'don't spill' is because the brain acts on the 'action' word in the sentence - it hears 'fall'/'spill' and so is more likely to act on it. If, instead, you were to say 'be careful' it is more likely no fall or spill will occur.
When asked 'why do you want this job?' talk about what you can bring to the role and why this excites you instead.
Make sure you have a good handshake.
If offered any form of drink, don't accept.
I'm sure there'll be others along shortly with other advice too. Let us know how it goes next week. 