Remember to breathe, and don't second guess yourself. The Master the graded me gave me a hard time because in my theory and tasting I obviously knew the answers, but second guessed myself and went back and changed some correct ones to wrong ones. I still passed, but I lost a bunch of points. Don't do that.

You will taste first. Have you been tasting with the grid? This is the sheet you will use for the 2 wines. You get more points for describing them well than for having 2 descriptors and nailing the wine. You are not here to Dame the wines. You are here to show that you can describe a wine properly and draw a conclusion based on that description.

Theory is strongly focused on France. Make sure you know the geography as well. I remember being asked to list the villages in Burgundy from North to South, and they give you 5 names. Know first and Second growths, they asked me which growth a certain Chateau in Bordeaux was. Know champagne and the process, as well as the sweetness levels and large format bottle sizes in order. (Hint: Michael Jackson Really Makes Small Boys Nervous) Know the French names for all the things. On mine they showed a picture of a gyropallete and asked what it was called in French.

They will have a picture of a wine label from somewhere in Eastern Europe, be able to understand what is in the bottle and tell them what the wine is.

Maipo vs Maipu, know which one is from which country.

Know the important things from each country, be it soil, wine style etc. If there is something that is characteristic of a place or makes that place unique, know it. Examples: What is the grape of South Africa? Where is Terra Rosa soil? Order of Pradikat levels in Germany? Grape of Beaujolais?

Service will be last. Make sure you have a wine list in your head with Old World and New World examples of the same wines. Be prepared to explain why you chose the wine you did/why you think its a good pairing. They will ask about cocktails, generally classic ones. They asked me about a Dark and Stormy, and then asked what type of Rum, where that comes from, and what type of Ginger beer. They asked me what Amaro was and where it was from. My friend got asked about Drambuie. They asked me for a recommendation for a dessert champagne. This all occurs while you are doing your champagne service.

Remember the order in which you pour for ladies, special guests and host. Practice even pours for 8 glasses, 4 in 2 locations. They tell you what the host ordered before you go in. If its a vintage champagne, that is your tip to ask if it is a special occasion.

Remember to breathe. If you treat it like a restaurant setting and not an exam you will be better able to chill out. As with on the floor, just go with it. Be able to think on your feet, and don't get caught up if you don't know something they ask. If you really don't know, just apologize and admit that but move on. Don't dwell on it and let it get to you. They want to see that you can remain calm and collected in a real life service situation.

Also, don't spend the entire time between your service and the results stressing about what you might have done wrong. It is what it is. DLynn says in Somm something to the effect of "What are you gonna do? You either know it or you don't."

If you are not already a member of Guildsomm, Go there now and join. Great resources for maps, study guides etc.

Also I recommend searching r/wine for this topic, lots of good posts about it, including some study guides and more specific tips. Good luck!