This kind of became a joke but whenever sharky is playing a video game or something else where he needs to win, I used to try to encourage by saying "You're doing great, you can do it" and such. But when that wasn't working I started saying "You Suck, that's terrible, how are you so bad' as a joke and it usually works coincidentally because by the time I start saying that he's been at it a while and is probably getting the hang of it.
What type of encouragement do you use? Are you a reverse psychology type or do you just give straight up supportive words? Something else?