The small things!
I was first awarded 16/20 for my 2nd Calculus test and I was really disappointed.
I spent a long time looking for jobs and got my priorities all wrong at the start of this semester and I really struggled for Class Test 1 which I thought was a really easy paper.
I was so disappointed I was desperate to get 17/20 on the 2nd one to give me 28/40 (70%) which would give me an A for my coursework. After going through my paper, the lecturer realised that there was a mistake and boosted it to 17.
I think this will have a massive effect on me psychologically going into the final exam! :)