Cooking the meat is cool. But, being someone of french gastronomical culture, I to to lean to Fernand Point saying : "Du beurre ! Donnez-moi du beurre ! Toujours du beurre !"
(basically, butter, butter, butter).
There was a recipe from G. Ramsay where it show to first sear the steak in oil, then, finish it with a bit of butter. It adds flavor and prevent the butter to burn.
I also tend to use my finger to test if a steak is fine. I'm no expert, but it works 80% of the time (to get a good steak). Now I must admit that sous-vide gives a lot more control and helps to reach the medium cook on a much wider part of the meat.