Hopefully you will get this before your checkride but even if not, it may help others waiting for the same thing.
The best advice I ever received when taking a private oral, was BE CONSERVATIVE! No, im not talking poitically. Especially when answering those scenario based questions like "What would you do if..." For example, a good one is "What is the minimal amount of fuel you would use for this trip?" Now, most PPL candidates would use the chart to figure out a burn rate, calculate time/distance and figure out fuel, then add the 30/45 minute VFR minimum fuel. While technically a legal answer, that does not show good piloting - especially for a private. Generally its advisable to round up burn rates, use extra time to round up, and then just add a whole extra hour instead of 30/45 minutes.
This can also work to your advantage. If you do not know the answer or are not sure, go with the more conservative answer. While it might not be the "Right" answer, it will still be legal. IE if you forgot all the different minimum class G VFR wx mins, you could always go with more conservative answers.
Again, this may not work with all examiners (they may want the exact, textbook deffinition) and most likely will not work with your commercial or even instrument. They will want more exact answers.
Just my two cents.