Cook slab of ribs slowly, OUTSIDE, away from your house so the house doesn't heat up with excess heat. This is especially important if you live in Florida and it is now getting to be 99 in the shade.
Most important is your grill must have a temperature gauge. That will help you cook the ribs at the right temp so they don't dry out.
Lightly brush on a coating of your favorite BBQ sauce. I say lightly because if you put on too much it will burn and burnt ribs taste like ass. Major BBQ fail!
Make sure you make some sides to go with your ribs, (that cooked outside and not in the house thus heating up your home to uncomfortable sauna like temperatures). BBQ beans are a good choice. So is cole slaw, potato salad, fries, and garlic toast.