Rhino is a great tool, but out of the box some of the commands are not exactly accessible - too many mouse clicks to duplicate an edge, or do an intersection. Custom toolbars, such as this one are cool, but keyboard shortcuts are still quicker! Through the options menu I've customized the keyboard settings for the ten or so commands I constantly use:
CTRL-C = _copy
CTRL-M = _move
CTRL-U = _unrollSrf
...
