TW, On the day of my practical, I went out by myself first and ran through a flight practicing most of the things that were going to be in the test (normal/steep turns, stalls, Emergencies, landings(flapped, half flapped, flappless, glide) etc). Then, after a break and a cuppa, The instructor asked if I was ready to do the test. My answer was "Yeah, either I'll pass or I'm going to identify things I need to practise". This took the pressure off me and let my instructor know that it wouldn't shatter me if I didn't perform to standard. My motto for flying has been I have the rest of my life to get it right.
SO good luck and take the pressure off yourself.
Phil