Dick van Dyke has admitted, as he approaches his 100th birthday, that if he doesn't keep up one aspect of his weekly routine, he "really can feel it". Born in 1925, Dick, 99, whose acting credits include the childhood classics Mary Poppins and Chitty Chitty Bang Bang, turns 100 on December 13, and he continues to "do guest spots" despite his age. In a series of revelations that will likely interest anyone wondering how Dick manages to do it in his advanced years, the US actor recently wrote a