I assign having two big exams on the same day. In my case it is the largest unit of biology and then the really enormous geography unit that took us a full 6 months to learn! Now it's partly due to the way I revise but basically it means I only have the time (and ability) to properly revise for one of them. Since biology is technically more important I'm going to have to concentrate on that and just hope I fluke the geography like I did last year.
So, yes, there's my life story! Wish me luck for tomorrow