I'ts The Final Countdown!

[Chubb]

Make sure when you are checking your mirrors make a point of moving your head slightly so the instructor can clearly see that you are doing, this was a tip I had for my test.

[Dire]

If you fail on a technicality you cant really help that... Lots of good drivers fail and lots of bad drivers pass
In my test I hit the curb at one stage (not even while parking!) and still passed, it all depends on the assessor and how well their day is going

All you can really do is be confident but not cocky. Don't want them to judge you as being afraid of driving, or as being an idiot
Just relax and don't rush stuff.

I didn't even get asked to parallel park.

You've got plenty of practice anyway