A quick trick to test the doneness of your beef. The fleshy part of your palm mimics the tenderness of your beef. For example, if you like your steak rare, your beef should be as soft as your palm while it's wide open and relaxed.
How to cook steak. What you do is hold your hand as shown in each photo. Then touch the fleshy part of your hand to feel the difference in firmness. Each diagram shows the way to hold your fingers to determine the doneness of the meat.