Previously I’ve told you that you can clone an object in PowerPoint by Ctrl-Drag, but I forgot to tell you that you can do so with just the keyboard too. Try Ctrl-D.
P.S. For those of you who wonder why I would blog software entries like this. The usual reason is: someone just asked me (if there is a way to clone objects using just the keyboard and she already knows about copy Ctrl-C and then paste Ctrl-V). 
