For it is the night before your test, I do not suggest you practise too much or stay too late. Just relax and reflect on the structures of the test. On the other hand, prepare your ID card, entrance ticket, a pencil, eraser, fill in all the items if needed. Have an early sleep. Next morning, I only sugget you do one model test....then go to the test center. Bring some materials for reading when you are waiting.