Remove the steak from the refrigerator and let it warm up towards room temp.  About 20 minutes while you prep the grill.  This will let you get a good sear on the steak and get the inside cooked just perfect.

Trim any excess fat from the outside edge of the steak.  This fat won't add flavor and will only lead to flare-ups on the grill.

Prepare the grill with a 2 zones: high and medium-low heat.  For charcoal, that is 2 to 3 coals thick for the high zone, and 1 layer of coals for medium.  Clean and oil the grate.

Sprinkle a good amount of salt and a decent amount of ground pepper on the steak.

Place the steak on the hottest part of the grill (on the grate, of course).

Grill until you get a good sear.  This depends on your grill, but probably about 2 to 3 minutes. If you get any flare ups that last for longer than a few seconds, move the steak to a different part of the hot grill until the fire dies down.

Flip it, grill for 2 minutes then check your temp.  Remove at 125° F to 130° F  for medium rare.  Use a good thermometer to check.

If your steak is extra thick, the outside may be seared, while the inside is still not up to temp.  Move to the steak to the medium low side of the grill and finish it off there until it comes up to temp. If you have to cook for more than 2 minutes, flip it until it is done.

Once you pull the steak from the grill, let it rest for about 5 to 10 minutes.  The temp will rise a few degrees.