My kids were also tested in Kindergarten. The most difficult thing for my youngest (a girl) was that they read the questions to her, rather than letting her read them herself. Luckily, she was having a good day of listening. If your child is already reading well, you may want to read her some multiple choice questions to get her to practice listening skills. You may also want to include listening and doing problems, e.g. draw a circle inside of a triangle. All of my kids also talked about the folders and how cool that was - they set folders up on the spines to create little cubicles so the students can not see each other's work. Playing a game or something with these barriers in the way may also make her more comfortable in the actual test.
I echo the good night sleep and the good breakfast as being important.
Finally, try to deal with your own anxiety so that your child does not pick it up. I always tell mine: "Just do your best and have fun with it!"
Peace and Joy,
Alisha
