The diversion route I was given would have taken me straight through a danger area so I totally echo comments about orbiting and make sure you're happy with your heading, ETA and route before you divert! I felt I orbited for ages before heading off on that leg! God bless the inventor of the Knightston diversion computer, just a small piece of plastic but so useful!!
At one point on a rather lengthy nav leg my examiner dropped off for a few minutes! I thought it was a wind up, made me more nervous than when he was awake!! If you explain what you're doing out loud to the examiner, when under stress or pressure it makes both of you aware of what you're doing and most importantly can make you realise if you're forgetting something.
It is tiring but really good fun, it's surprising how quickly the flight passes.