No matter what you do, no matter how hard it is, no matter how challenging it isdo it with a smile on your face.
Body does what mind prefers.
Most of the preparedness happens during training every single day, so it's all about getting to a meet and being as relaxed as possible. Personally, I just try to stay in the crowd of people, just talking so my mind doesn't think only about swimming. That helps me to relax. And at this level, we all know what needs to be done once we jump in the pool
If it's going to be, it's up to me.