The old CA3 papers are still useful practice, just ignore the presentation element obviously.
Whilst this maybe has a perception of being a lottery more than some other exams (a view particularly held by people that fail it), it's still the case that the more you prepare and practise, the better you get. My advice would be to start preparing reasonably early, and take it as seriously as you would any other paper. Good luck!
Last edited by a moderator: Dec 27, 2018