On the day before the B2 Exam, I just stayed in the hotel and had a video chat with my family and some friends. It is always good to get in touch with the people behind all this difficult undertaking. It can uplift spirits. I also listened to Hillsong United music, which has always reminded me of Him alone. There was but nothing else I could do a day before. It was the perfect time to surrender everything to Him. The days of labor were gone and few hours later on could already be the final battle-- the moment of truth. I say, rest your thoughts the day before the exam. Your swords have already been well hefted, ready to conquer.
Always put your best foot forward in everything that you do, so that if everything doesn't turn out right, you still have all the time in this world to rejoice. What I mean is, wake up even if you feel tired, study even if you don't feel like doing so and keep going even if you so want to give up. Go back to the very reasons why you shall be taking the exam. Don't worry, it is a but a guarantee : something good is bound to happen. It may not happen now, but it shall happen. Keep pushing!
Above all, rest everything to Him. When you think you already have done your best, God will definitely do the rest.
Ich wünsche euch viel Erfolg!