go to observe the test area before your actual one. it will help as u will familiar with the area.
if u didnt take any lesson before that, i advise u not to be the first driver to take any test, try to be the later ones, as u ll be able to notice how they managed or not managed to do their parkings / test.

As for road test, cant help much, just drive slow (about 60kph) and concentrate.

good luck