Surrender, surrender, surrender
In addition to learning the correct order of classes, developing cueing techniques, and refining your practical adjustments, teacher training is a transformative experience.
You learn as much about yourself as you do about practice. So be ready for a change in perception as you move through the course.
Take some time every day for quiet reflection and when you need to look after yourself: extra sleep, hot ginger tea, Epsom salt bath and fun things (no yoga) to let off steam like running and concerts or spending time in nature.
All of these things help make the transformation go more smoothly and allow you to absorb the yoga into your cells.