Guidelines for writing appreciation letters: State what you appreciate and briefly explain why. This article explores the value of sending gratitude messages and introduces guidance and templates for writing them.Dear best friend, You're such a great blessing and every day I thank God for your mere existence. You simply make everything brighter. Add a personalized touch to writing thank you messages for friends with these 30 ways to express your gratitude perfectly. Thanks for always cheering me up whenever life knocks me down. You are a great friend, and I hope always to have you in my life. I want to thank you for allowing me to be part of your career journey and appreciating my help and knowledge. Thank God I have a best friend like you buddy. Seriously sincere friends are blessings of God.