I won't say it anymore because I don't do it.
If I were in Miss Nash's 4th grade class, the sentence would have to say, "I will not talk in class." And I'd have to write it 500 times so I would stop doing it. I did stop (finally), and I'm stopping now.
Henceforth, all future announcements will let everyone know when I've decided to stay up late instead of empty proclamations that I'm going to bed early.