Euro 2012: Ashley Cole and Ashley Young backed to recover from England's penalty shoot-out miss misery - Telegraph

"I think penalties is always down to luck. It is a lottery. It is just the way it goes in football. You can practise and practice as much as you want but when it comes to the occasion, the big stage, it is always difficult. I hate watching it.

At least he gets what's unrealistic in his practice:

Euro 2012: spot-kick obsession weighing England down, laments Roy Hodgson, after defeat to Italy - Telegraph

I'd been watching Ashley Young and Ashley Cole smashing in penalties in training but you can't reproduce the tired legs, pressure and nervous tension It has become an obsession for us in English football.

Well there is a lesson in Panenka's account of how he invented his signature move:

Panenka reflects on perfect penalty at EURO '76 - UEFA.com

After each training session I used to stay behind after a game with our goalkeeper and take penalties - we would play for a bar of chocolate or a glass of beer. Since he was a very good goalkeeper it became an expensive proposition for me. So, sometimes before going to sleep I tried to think of ways of getting the better of him, to recoup my losses.

I got the idea that if I delayed the kick and just lightly chipped it, a goalkeeper who dived to the corner of the goal could not jump back up into the air, and this became the basis of my philosophy. I started slowly to test it and apply it in practice. As a side effect I started to gain weight, because I was winning the bets. I started to use it in friendlies, in minor leagues, and eventually I perfected it so I used it in the main league as well. The culmination was when I used it at the European Championship.

IMHO the key part is right at the start: he practised penalties after each training session. When players are exhausted and just want to go home already.

_{*Lunatic*, n.
One whose delusions are out of fashion.}