It is a bit long, isn't it? To summarize briefly, anger can be constructive or destructive and controlled or spontaneous. When anger is used appropriately, it is a powerful and important tool.
It gets into "you" statements, which put blame on the other person, and "I" statements, which take responsibility and disarm the person you find yourself arguing with, like letting go of your end of the rope in tug of war.
You really need to read the article, though, to get everything out of it.
The whole site looks good, but I haven't had time to read much other than the one article yet. The author considers himself a "psychohumorist," and his style is fun to read, although much of it went over the heads of my girls at work and I had to explain it to them.
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“We should always pray for help, but we should always listen for inspiration and impression to proceed in ways different from those we may have thought of.”
– John H. Groberg