Mental toughness is what differentiates a good goalie to a great one. You can have the best technique in the world but if as soon as you allow a goal it affects you it will all go away really fast. If you're on an elite team, you won't see a lot of action but you have to stay focus or too many nights you will allow 3+ goals on 20 shots. If you're on a rebuilding squad, it's not easy losing night after night but the save percentage will look great facing 40 shots a game. If you're on a middle of the pack team you just know you can't make a difference on your own. Mental side of the game and stamina are two important attributes that Henri Losanov try to work on. He talks regularly to a sport psychiatrist that helps him with his stress and anxiety of performing well. Stamina is a lot easier to work on, up on the treadmill and just go for an hour.