You aren't allowed to redo any of the abnormal and emergency operations though, so make sure you get them right first time. These include simulated engine failure after take off, simulated forced landing, simulated precautionary landing and simulated emergencies.
To prepare for my skills test I just studied the relevant bold face actions on the checklist, double checked all the relevant general knowledge bits (V speeds for example), and from a chair in the crew room flew various parts of the test in my head, so going through a PFL, stalls, etc. The other key thing is to relax!
Good luck!
ASI