For baby back ribs I'll use a generic meat seasoning I buy at my local supermarket. It has all the regular stuff like salt, pepper, red pepper, paprika, onion powder, garlic powder etc. I take about 3-4 tablespoons of that and about a cup of brown sugar and mix it up. That's my rub. I'll remove the thin white membrane from the bottom of the ribs and rub it with olive oil then work the rub into the meat, bag it in ziplock bags and toss it in the fridge for 24 hours.
Grill the meat at low temperature (around 200 degrees) for about an hour and a half to 2 hours or until meat is tender but not dry flipping periodically. About an hour in I like to stack the meat so that the juices don't drip off but rather they soak through the meat. Brush on favorite BBQ sauce (Sweet Baby Rays-Hickory is pretty good) and turn up the heat to carmelize the sauce on the meat. Do not burn though!
I made these last weekend for my Mother-In-Law (she's from Texas), her son and his wife and a couple of her friends and everyone raved about my ribs (I made two full racks-should have made more). They were very good I must say, very tender and tasty.