I've never quite figured this out, I see all these wonderful pictures with beautifully decorated cakes/desserts on plates and other "sets". but how do you after decorating the darn thang, move it?

I've read about decorating on the presentation plate with parchment strips and then pulling the parchment from under it, but I worry that I might do it wrong.
Also, is there some kind of a spatula thing that you can use to move your cake?