Is there an easy way to determine if a truss rod is adjusted properly, and to ensure the angle of the neck is correctly adjusted?

One source mentioned placing a straight edge on the frets.  Then sliding the straight edge up the frets/neck toward the bridge.  If the neck is adjusted properly, then the straight edge should land on top of the bridge while resting on the frets.

Anyone know another way to easily check this for correct adjustment?

Thanks.

RB

Frank Ford has a great article here:
http://www.frets.com/FRETSPages/Musician/G.../neckangle.html (http://www.frets.com/FRETSPages/Musician/Guitar/Setup/NeckAngle/neckangle.html)
And here's his article on truss rod adjustment.
http://www.frets.com/FRETSPages/Musician/G...dAdj/tradj.html (http://www.frets.com/FRETSPages/Musician/GenSetup/TrussRods/TrussRodAdj/tradj.html)

Hope this helps!