i already know them. they are indeed very useful. much faster than hunting through the pallette.
in CS2, i turned on 'scroll to zoom' this is incredibly useful, as it makes it more like a CAD program, where i have gotten so used to scrolling. if you are scrolling to zoom, it would be very good to use middle mouse button for the hand tool, but i dont think there is a way really.
EDIT: that square brackets thing is really good. thanks.