Focus when training. Keep your mind on what you're doing, and, more importantly, what your opponent is doing. Not doing so will force you to lose bets with fellow auror trainees (and don't make bets either, betting that you'll last longer in a duel is like jinxing yourself).
Private to self
Really have to stop thinking about Hannah when I'm training.
Can heros be bruised? Because I certainly look like I'm "fresh from a fight" with this giant bruise on the side of my head. Gods, Jones is going to kill me when she hears how poorly I did in that exercise.