I was having my breakfast and lunch at the same time at my drug store–Starbucks, and overheard a girl saying this.  She summerized my test/exam philosophy well. 
Short memories work the best.
The problem is that the part of my brain that is supposedly in charge of long term memories finds remembering all sorts of stuff quite useless.  So it decided that it will only keep pieces of them, mostely happy stuff. 
And I second that motion.
This is what I usually do to prepare for my exams: wait till the last minute.
And I know this worries and astonishes many people at the same time.  Some of them are crossing their fingers and toes for me, after hearing this.  So am I.
May the almighty short memory work its charm this time.