URGENT HELP music exam TOMOROW!?

hi, i play the saxophone and i have an exam TOMMOROW! i have taken 1 exam before (grade 2) and now i am taking grade 3. but i need some tips and advice! just ANY tips on how to prepare before hand, any useful things to take with me (apart from the actual saxophone and books!) also, should i use the reed i have always used or should i use a brand new one? help would be VERY much appreciated:) thanks