I really don't do nothin'.I just enjoy the moment as it was a good one.This usually doesn't happens to me,and even if it happens I have some good grades to raise this one.I don't care too much,because I consider grades useless.They are putted there to show the level of the student and in most of the cases they are not.
Its the only way.
But don't feel too bad though Jules, I recently got had an assignment mark back of only 48% and it was worth 50% if my final grade. I went into the exam (the other 50% of the final grade) with a big job to do.
I came away with a 63% overall grade. By working my ass off I've got a 2:1 grading overall. It is do-able, you've just made things a little harder for yourself, thats all. Good luck! 😄