This is not about building better decks, that's got plenty of threads and examples already. This is about how to improve your play skill in battles. Something my record and league record show I'm not great at, so I'm looking for tips, on how to make the practice of games work better. First a tip I picked up back when I played Magic. Keep a d4 by your computer, every time you make a mistake, increase the count by 1. If you hit 4, you lose, even if you end up winning the game. Eventually this should help you learn to notice the mistakes before you make them. So what are other people's tips to stop being a bad player?