Preparing to do a tarot reading (for someone else).

[MouthOfTheLion]

With the exception of a couple practice readings on my mother, I've only done readings for myself and I don't really do any preparation because I think of it as practice. The readings I did for my mother were a little draining, probably from performance anxiety, but I've seen several pro readers talk about how they have to prepare themselves before/between readings with clients. Do you do anything to prepare yourself energetically (or center yourself, regulate your nervous system, whatever phrasing makes sense to you)?