Seeing as there are so many people who can't be bothered to make the effort, I thought I'd trawl through the old thread and pull out some gems. The following links are full of useful tips and advice. If the answer isn't in there, then it probably isn't that important.
Stage 2 - Pilapt
Stage 2 - General
Stage 3 - General
Stage 4 - General
You will notice that there is no link for any Stage 1 info, because if you haven't got the initiative to fill out an application form without someone holding your hand, then you're probably not what CTC are looking for.
Good luck to all who apply.
Streety.