I've never heard of the HALT method, but apparently it's something addicts use to help themselves avoid the temptation to use. What does this have to do with parenting? Well, this post from Simple Mom applies the principles of the HALT method to becoming more proactive at setting your child up for successful behavior & avoiding common triggers for bad behavior (i.e. Hunger, Anger, Loneliness & Tiredness). It's not rocket science, but it is a good reminder to be mindful of how you plan your child's day.
I'm not proud to admit that I lose it & yell at my kids sometimes (I don't yell ugly things at them at the top of my lungs, more like using a too-loud voice & a harsh tone when they've pushed me too far). Anyhow, it's something I regret doing the second after I'm done & something I have tried to work on for years. I have gotten better. But, this post by Kate, from the Picklebums blog, does a nice job of helping with strategies to avoid the yelling.