Saying 'thank you' sure does go a long way, but cultivating a culture of gratitude by being thoughtful and authentic will lead toward increased productivity, not to mention a more engaged workforce who may be more inclined to pay it forward.

Take into consideration that individuals are different; a one-size-fits-all approach to conveying appreciation rarely bears fruit. Take a moment to express your appreciation for a job well done by speaking in the language of the recipient.  

This article is a good reminder of the additional points to consider as you become of master of appreciation.