One of the keys to a great or even a good steak is the grill temperature. I have never made a good steak, just ok on a portable propane grill. You need a big boy with lots of heat, 550-600 F for at least a minute or two sear the juices. Those small bbqs just can't get back up to temperature once you put the steak on the grill. The other is the marinade but I prefer nothing more than salt and pepper on my steak, maybe a bit of butter.