For me, it depends on the quality of the meat. If the meat is really good (e.g., from Fresh Market or some place similar), you don't need much marinade. I use melted butter, salt, pepper and a small amount of olive oil. I also try to get steaks that are about 1.5 to 2 inches thick. I get the grill as hot as possible without burning the meat (that would full-on high for my grill, which is not a great grill). For a 1.5 inch steak, I would cook it about 7.5 minutes on the first side, then a little less than that on the other side. That will get the steak to about a medium to maybe slightly more rare than medium. Obviously, if you like it more done, add a little more time, but not much, it will cook pretty fast in the final seconds before you flip it and before you take it off. Good luck. It took me about 5 years to figure out how to correctly grill a steak (and I still screw it up sometimes).