A royale is, in my opinion one of the best grinds. A royale is a frontside (or backside) where you are grinding on the outside of your skate and frame on your back foot and the inside of your skate and frame of your lead foot. To do a royale skate up to what you are wanting to grind at about the same speed you would for a frontside and jump up onto the rail or curb in the royale position. It will feel kinda wierd at first, but you will get used to it. be sure to lock on in the royale position instead of locking on frontside and then going into a royale, otherwise you will just have to relearn the trick later. Some people like to unbuckle their skate to do this but it really isn't necessary. This trick is easier the lower you are, and if you bend at the knees instead of trying to do all of the bending at the ankles it's a lot easier . A variation of this is a backslide, which is a one footed royale, you are holding your lead foot and grinding on your back foot.