"Throat conditioning" is an interesting idea. I like to tell my boys to think before they talk. You're spot on that un-thought speakings lead to bad feelings and anger, and some times the things we say can't be walked back!

I remember once apologising for an outburst of mine by saying "I didn't really mean that," and was told firmly - kindly, but firmly - that "If you said it, you meant it." That stuck with me, and I believe it to be true. But nearly anything can be said in a positive fashion, once we think about it.