When I was an undergraduate, I have the time to watch 9pm shows everyday, play soccer twice a week, study only until dinner time during exam periods, can even continue playing soccer during exam periods, sometimes can even afford the time to watch anime and serials during exam periods. And I can manage to get A, A+ or at least a B+.
Now, I stopped watching 9pm shows. I study until around 10-11pm during the exam periods. I stopped playing soccer during the exam period and I haven't even watched anime for a long time. But now..... Im struggling to get a B! What is wrong????!!!! Why is there such a great difference?