God grant me the serenity to accept the things I cannot change; the courage to change the things I can; and the wisdom to know the difference.

Believe me, this applies to people other than alcoholics. I'm often amazed at how much stress in my life turns out to be about things that I can't do jack shit about, and I bet that's true of most people.

A comment on this prayer from an odd source:

This remarkable statement is attributed to a theologian with whose ideas I disagree in every fundamental respect: Reinhold Niebuhr. But—omitting the form of a prayer, i.e., the implication that one's mental-emotional states are a gift from God—that statement is profoundly true, as a summary and a guideline: it names the mental attitude which a rational man must seek to achieve. The statement is beautiful in its eloquent simplicity; but the achievement of that attitude involves philosophy's deepest metaphysical-moral issues.

- Ayn Rand, "The Metaphysical Versus the Man-Made"