Even if one is in disagreement with the thrust of a pedagogical discussion, such discussion can trigger useful new ideas or memories of old ones. It is not always easy to remind oneself of these things. Active participant June 15 - June 19, 1998. See especially Vol. A Personal Perspective ,'' by Steven G. Krantz, American Mathematical Society, 1991.
Good writing requires careful planning and much thinking and rethinking of ideas.
This results in better classroom presentation. I also keep a copy of Fowler's Modern English Usage, the Oxford Dictionary, and Roget's Thesaurus within arm's reach of the computer where I write.