MrpreP,
The only thing I did before hand was a refresher on my speed distance time formulas for the maths component. Honestly, I don't think you can prepare for any other of the exams.
It wasn't what I'd call a super hard lot of exams... the not knowing the pass marks etc is what will eat at you most !! - But that's my personal opinion.
Just forget about each test as you move onto the next though.
Goodluck!!