Great instructions except that you forgot that you have to start prying next to the valve stem or you can not get the rest of the tire into the well of the rim. When you put the new tire on you must install the portion next to the valve stem last for the same reason. Allways press the valve stem most of the way into the tire before prying the last of the tire on the rim or you may pinch the tube.
Soap solution is preferable to WD40 as it does not react with rubber. Make sure the tire is free of the rim edge all the way around and apply soap solution all the way around the rim.
You can buy rim protectors to avoid damaging the rim, or use pieces of leather between the tire lever and the rim.