are a couple of quick tips from a recent 3ds Max Design class
that I was teaching...
3d model rotate - hold down the Ctrl key and mouse wheel to spin the model.
Cloning - Move tool, hold down Shift. This will duplicate the object, but giving you the option of Copy, Instance or Reference. Instance vs. Reference... Instance you can change any of the object copied and it updates all of them. Reference, you need to change the original, to update the others.
Save Copy - This saves your scene and adds a number sequence to the end of the file name.