Sleep, brain food and a bit of preparation...
Scan like your life depends on it (which it will).
Think systematically, being situationally aware allows you to disregard the information on the plate that is no longer applicable.
Give the plate a good study before you go and fly it, don't forget about the missed approach, don't just go around at MDA when you're expected to fly level until the MAP (like I did in my IR skills test, luckily he passed me as it wasn't unsafe).
What aircraft are you learning in? Flying the test in a Seneca will be a nightmare in comparison to something like a DA42.