How do you grill?

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Yesterday was my first attempt to use a barbeque grill. I called my dad for advice on how to use the grill and how to cook on it. I asked if he put foil on the grill or just slapped the meat on it. He just slaps the meat onto the grill, I prefer to use foil. I'm not sure I will stick with using foil though as my ribs got stuff to it pretty bad. So how do you cook on the grill?