Try to discover which side the penalty taker favors. Watch the attacker to see where they glance at the goal, although they may try to fool you. Check the foot angle just before contact with the ball, but mostly concentrate on the ball itself. Dive slightly forward to prevent a hard penalty from pushing your hands into the goal. Some keepers favor playing percentages and guessing one sode or the other, others rely on minor mistakes to give them enough of an edge to react once the ball is kicked.