Ribs are my favorite and I've just recently started making them myself. Since I have a gas grill with a smoker box in a wierd orientation, I can't get the heat as low as I'd like it while keeping the wood smoking. Therefore I cook the ribs for only 2-2.5 hours when I'd like to be able to do more.
Start with 1 or 2 racks of ribs, and apply your favorite rub. Then let them sit in the fridge for a while to absorb the flavors, I'd say 4-8 hours.
Heat up your grill for indirect cooking, the smoke is optional but I prefer the taste. If you're doing smoke you need to soak the woodchips for 30 mins before putting them in the grill.
Place the ribs on the grill, cover it and cook for 2 hours, liberally brushing it with apple cider every 30 minutes to keep it from drying out. Rotating the ribs half way through is a good idea to ensure more even cooking if you have any hot/cool spots.
Apply your favorite barbeque sauce, and cook for another 30 minutes. I like to use http://www.epicurious.com/recipes/food/views/Cherry-Cola-Barbecue-Sauce-... as it has great flavor and I like sweet and tangy bbq sauce.
Thats it, remove ribs from the grill, slice and serve.