D'oh! D'oh! Why we make same mistake twice - Behavior- msnbc.com

People really do learn from their mistakes, but not in the way you expect.

Trying to recall something incorrectly, like when something is on the tip of your tongue, only reinforces the wrong information in your brain. Instead what you should do is immediately look up the right information and repeat that to yourself again and again. That's how you can avoid making the same mistake twice.