Mums and dads, how do you deal with exam related stress for your kids?

When I was younger, my parents would keep reminding me that temporary hard work for the exams is nothing compared to the freedom I'd have after they are over and the awesome feeling I'd get after receiving great results. That would keep me going and inspired for my exams. My parents would also let me and my brothers have the occasional treat of cookies and ice cream after the completion of each paper.