Mentally tough folks learn from their mistakes, they refuse to be crushed by them. Here is a tip on how to make mistakes work for you:
“Making a mistake is just a source of feedback informing you that you are off course use that data to focus on what to do next. Then forget the mistake. You can visualize yourself flushing it down the toilet or releasing it in a balloon. The point is to leave the mistake behind and build on what you’ve learned. You cannot perform at your best by focusing on your worst.” Source