You mean written, as in qualifying for National or better, correct?
I highly recommend that you practice physically writing out your answers to sample questions, and doing so with a stopwatch/timer. Try to get it so you can write out a legible and complete answer that hits all the points in 10 minutes, although 8 minutes is much better from a time management perspective. Do this over and over again until you can answer all the sample questions at a master level (that means, you cover all the points in the question, supply additional details, etc.) within that time limit.
Yep. That's the one and that's what I'm doing.