Refer to a Book The One Minute Apology, By Ken and Forward written by Spencer Johnson. When you make a mistake, Don't delay in expressing your sorry; when you delay your response you compound the problem.
Mistakes are made by every one; this book will help you to set things right. It explains with an example ..How to correct your mistake and make things better.
It's not just a Technique, it's not just a book, It's philosophy to live and take benefit. One can get great benefit from the book if he or she is passing through tough situation.
