Blanking on the air

Almost every DJ has feared this happening at least once.  You have something smooth, profound, or thoughtful you want to convey to listeners.  When you go on the air, however, your mind goes blank.  A DJ told me he once planned to end his shift with the advice, "Don't always reach for the brightest star; sometimes, it's the most dimly lit star that takes you furthest."  When the time came, however, he opened the mic and said, "And remember...Um...Well..."