It's always been a problem with league play especially, casual there's less decks that try to kill you in 4 turns while you can only watch, but I have found that random battle with cpu although only for 10 tickets, is still good practice for anyone. I still catch myself doing stupid stuff like accidentally playing the evolution zombie and then realize that the zombie that I was evolving is still in my hand and skink didn't get 2 damage to all plants
Sometimes I play like a burnout, but I get into game mode for league games when I play, because I know that the other guy isn't going to give me a break in instances where I bleeping bleep up