Perhaps some one could come up with a potion for winning penalty shoot outs?

It could be just water but would work on the placebo effect. If you have confidence that something is improving your performance and results - it probably will. I am not sure that the German approach to training for penalty shoot outs does improve their chances - but if they have confidence that it will - it may do.

Conversely - if you think your team will never win on penaties - they probably won't.