If you don't know how to cook the perfect steak, learn from an experienced chef -- like Gordon Ramsay. Except for that part where he insults people and makes them cry. Don't do that stuff!
As for the steak, though, a video posted to Ramsay's YouTube channel reveals a steak-cooking secret to a group of aspiring young butchers. Basically, Ramsay uses different points of his face to establish how a rare, medium, and well-done steak should feel. For example, a rare steak will feel like your cheek, medium like your chin, and well-done like your forehead. But it all makes more sense when you watch the video.