There are about 3 million notes in a two-and-a-half-hour musical; being a perfectionist, it took me a long time to realize that if I'm hitting 75 percent of them, I'm succeeding. Performing isn't only about the acrobatics and the high notes: It's staying in the moment, connecting with the audience in an authentic way, and making yourself real to them through the music. I am more than the notes I hit, and that's how I try to approach my life. You can't get it all right all the time, but you can try your best. If you've done that, all that's left is to accept your shortcomings and have the courage to try to overcome them.
As Brene Brown states, you invite criticism simply by "stepping into the arena." Social media amplifies (and dumbs down) criticism - snark is so easy. To accept criticism with grace (even if it doesn't deserve it), forgive yourself, and work on improving is the mark of a true professional. And as Garr Reynolds points out in his discussion of this situation in Presentation Zen, Menzel asserts rightly that authenticity and connection trump perfection.
By committing her high-profile mistake, and most importantly by her handling of it, Idina Menzel has taught something important and useful to all of us.