Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).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. The message of appreciation should stand alone. Be brief, warm, and sincere. To my boyfriend, Thank you. Thank you for choosing me and loving me, every day. My parents have taught me how to work hard, be curious, and remain critical. They've always tried to make the world a better place. Thank you all for being my builtin best friends.