I know we have a "help hints" thread already, but not a dedicated shortcut key thread, as far as I know.
Can we perhaps compile a useful list of shortcuts for Max? I'm trying to lean as many as possible, so this may prove helpful to many.
So I'll start listing some,
Z: focus on selected object (F in Maya)
P, F, T, L, C: switch various views (Perspective, Front, Tall, Left, Camera 1)
Ctrl-Z: Undo previous command
Ctrl-Y: Redo previous command
J: Displays that little box around the object (not sure of the term)
Q: Switches the selection type (box, circle, line, etc.)
O: adaptive degredation
So feel free to add more or correct the above.