Mary Doria Russell, author of “The Sparrow,” a popular novel among my university classes, said that people who go on and on and on and on should join the support group “On and On Anon”! Whenever you’re giving a short or long presentation and you know that what you just said was it… Stop! You are done, that’s all. Sit. Trust your inner self and let it be. Don’t belabor or repeat the it, just let it linger in the air. You’d made your point, enjoy! Take your applause with humility and grace and sit down. Let whoever is in charge ask for “Any questions?” All you need to do is say that magic of wisdom that came from within you and sit.