At 205#, I'll never be a great climber, but I still love to do it when I'm feeling good. On a long climb or during a long climbing day I need to calm down and stay within myself. I try to concentrate on breathing and sometimes use "breathplay" to find a rythym. One breath for each 4 pedal strokes, or something like that.
Sometimes if I'm chatting with someone the climb is over faster than I expect.