Even more secret shortcuts:

With a building or unit selected, Hold shift and right-click and it will create a point for the units to go to. Continue clicking and the units will follow that path - useful to send them to capture a bunch of construction sites without you micromanging them. To get units to Patrol in a circle or something, I think it's shift plus left-click in patrol mode, and make sure the final point is where the first point is. I'll check.