Step 4: Add Water to the Pan
On the other side of the pan pour in enough water so that it pools, but does not touch the steak. Usually about a 1/4 cup of water works, as long as you're not adding so much that the liquid begins to pool under the steak. That will result in soggy steak, which is something no one likes.

Step 5: Now Steam that Sucker
Put a lid on the pan and turn the heat on to medium.

What should happen, if you read that part I bolded earlier, is that the water will heat, and steam will begin to fill the pan.