In this article, we explain what an appreciation letter is and how to write one with tips, examples and seven easy steps to write your own. A thank you to my guy best friend.Guidelines for writing appreciation letters: State what you appreciate and briefly explain why. Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word). I just wanted to say a big THANK YOU to you and your beautiful group. You have given me hope for the marathon; yes, there IS light at the end of the tunnel. Thank you for accepting me for exactly who I am. I can be stubborn, difficult and confusing, but still you are always there. Thank you, President Kelly, Dean Zeng, and the Sawyer Business.