I recommend figuring out what airports the examiner likes to take students, and practice those with your instructor.

Study the ASA guide, cover to cover. Remember the 5 T's, approach briefing and how to draw a hold (you might be asked to do one!). FAR's, lost comm procedures 91.185 (?), the A123 rule, be able to read a METAR and TAF, chart and plate symbols.......

In terms of the flight, maintain your scan, fly the airplane first. It will also help to do altitude callouts (1000 for MDA, whatever it is for that approach, 100 feet to go, minimums.....). Also, be aware that a 3/4 scale deflection or more is a bust, as is dipping below the MDA or DH without correction. Pad the minimums a bit, you can be a little above (I think PTS is +100 and -0).

Mine was a disaster, but I passed!!!