My favorites:
I've mapped the "a" to "open", "z" to "paste hold position", "g" is "point to point move". I also changed the "copy" shortcut to "c" and the "paste" to "v"...no need to use ctrl.
This re-maps some of the pre-programmed chief shortcuts, but it works better for me, and I think they're worth their weight in gold!
Cheers
Barb