This tip is one that always fascinates users who have not heard of this functionality:
Perhaps the most overlooked method of navigating in Google Earth is the technique of rotating the view by holding down the middle mouse button or depressible mouse wheel.
Give it a try. First, navigate to a favorite location in Google Earth. Press down the middle mouse button or wheel and move the mouse. Moving up and down tilts the view, whereas moving left or right rotates the view. Cool, eh?
This represents a very useful way to adjust your perspective of a location. In fact, this is how I always view an area once I have located it.