Maintaining your Grip Pressure

Everyone knows the grip is the only direct link to the club that the body has.  There's many characteristics of the grip that are important for its function.  One that goes unnoticed and could be one of the most important characteristics of the grip is the pressure applied.
The pressure you apply at the outset should be similar to a nice handshake.  Once you've applied that pressure comes the important part.  That pressure should remain constant throughout the swing.  The positioning of your hands shouldn't change but equally as important the pressure shouldn't change.
This is a tough thing to detect as an instructor.  Constant pressure plays a part in the positioning of the clubface throughout the swing.  If the pressure changes in either hand, it will most certainly effect the clubface at that instance.
Practice making a swing where all you do is focus on the pressure of your grip remaining constant.  Not tight, but constant.  Examine your grip after you've finished your swing and see if it has the same feeling as before you took the club back.
Controlling the grip pressure throughout your golf swing will go a long way to hitting more solid shots consistently.